So I'm completely new to Arduino and just making anything electronic in general. I bought an rc car kit and cant figure out how to place the wires on the Arduino UNO board. After that I need to get it programed, which I already tried starting, and I keep getting the error:
Arduino: 1.6.8 (Windows 10), Board: "Arduino/Genuino Uno"
Sketch uses 450 bytes (1%) of program storage space. Maximum is 32,256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes.
avrdude: ser_open(): can't open device "\.\COM3": Access is denied.
I don't know how to do this. 
I have already tried reading diagrams and looking through the forums and searching for videos, and I still haven't figured it out. could someone what I can do so this is a bit easier?
I can provide a link for the rc car kit and pics of the car if needed.
"contact the supplier for support" I thought I was???
Everything is Arduino, and I cant get help because its a kit? o.o
Post code.
Post schematic.
I'm sorry what? I don't understand?
where can I find a schematic? and what code?
??? 
I'm sorry I really don't understand any of this. I just found a set of instructions and put it together the best I could but I don't know anything about the wiring
You've wired something up.
We don't know how you've done that.
You tried to upload some code.
We can't see your code.
What do you think your next move needs to be?
Bro_Necro:
avrdude: ser_open(): can't open device "\.\COM3": Access is denied.
That is probably the problem, what does you kit manual say about programming.
Post a link to your kit
this is what I used to put it together and wire it. the kit didn't come with any instructions. I tried posting pics of the car but its to big to post apparently.
as for the code I used a blank code. I wanted to see what would happen using the blank code. blank as in there is nothing there. I don't know if there is an actual blank code o-o
That manual is chinglish.
I suggest you look at programming the arduino using the simple blink sketch as a starting point.
Get used to the interface and language first.
That kit although it may sort out the difficult mechanics for you seems to miss the programming basics, although i did not read all of it.
Stuff like this happens a lot.
I have used the blink sketch and I have 2 blinking lights and 2 solid lights (power/on) is this right?
if so where can I find something to teach me how to program this?
Start from scratch. Disconnect the Arduino from everything. Use udb cable, start the IDE and load an example code (they are somewhete in the file menu); compile it and upload it. Does it work? If you can upload, your setup is OK. If you can't upload, let us know.
If the upload worked, you can dig through the various examples to start to understand how to program. Also find a tutorial on the web about programming in C or find a book on C programming on the flea market; the older the better.
Your lcd seems to use I2C; if I'm not mistaken you need to download a library for that. Next you can connect the displayand try to display some text using the code in the link thst you provided.
Take it easy, take it slow and don't be upset if something does not work the first time. We're here to help.
Note: most of us are just people using Arduino but not asdociated with Arduino.
Something else - if you bought that kit off ebay, that "Arduino" is likely a knockoff (or most likely, a counterfeit) that uses the CH340 chipset for USB comms. You may need to set up a driver for that.
http://www.microcontrols.org/arduino-uno-clone-ch340-ch341-chipset-usb-drivers/
I can't vouch for any of the information or links at those sites, but dig around and verify your chipset and drivers for your board.
Can someone tell me what ENA, IN1, IN2, IN3, IN4, ENB, GND, and 5V are for and where I connect them to on the Arduino sensor shield? I'm still having trouble with the wiring. its been trial and error for the past few hrs.
We can't tell you how to put it together, because nobody here has the same kit. If you want help, help us help you. I know you are frustrated, but take this a single step at a time - that's general advice for any project.
So first, tell us about how you have your Arduino hooked up to your computer. A usb cable from the board to a usb port, right? Do you have the IDE software installed? Have you uploaded any example sketches? Like Blink.
Second, tell us what you do have wired up. What step in the manual are you on? Can you take a picture of your circuitry, just so we get exactly what you mean?
By the way, ENA is enable A, ENB is enable B, IN1, 2, 3, & 4 are inputs 1 thru 4. GND is ground, and 5V is five volts. Those last two go to the arduino pins of the same name. The others depend on your sketch.
Bro_Necro:
Can someone tell me what ENA, IN1, IN2, IN3, IN4, ENB, GND, and 5V are for and where I connect them to on the Arduino sensor shield? I'm still having trouble with the wiring. its been trial and error for the past few hrs.
I have to tell you, trial and error connections can easily damage electronic parts. They're not like Lego. So you can consider anything you did this with, possibly compromised.
it is connected by a usb cable. I have used blink unsuccessfully.
Arduino: 1.6.8 (Windows 10), Board: "Arduino/Genuino Uno"
Sketch uses 1,066 bytes (3%) of program storage space. Maximum is 32,256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes.
avrdude: ser_open(): can't open device "\.\COM3": Access is denied.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
Arduino: 1.6.8 (Windows 10), Board: "Arduino/Genuino Uno"
it keeps giving me this error.
I will add an attachment of a pic of what I have connected right now.
![0501162035[1].jpg](https://europe1.discourse-cdn.com/arduino/original/3X/7/7/772381d756762ad17ca23c34443f14b9d75a431a.jpg)
It's hard to see what is connected to what from that picture - the pin names are all in the shadows. Perhaps a hand drawn diagram would be more useful.
However the bigger problem is that you are not connecting to the Arduino. Here are step by step instructions (some of which you have already done) to hook it up: http://www.arduino.cc/en/Guide/Windows
Remove the Arduino board from the device, and wire it up according to those instructions. Then once you can upload an example sketch to the board, come back and we'll tackle the next step.
I think I need to connect these together to make the motors work. I need to connect this L298 board(first attach.) to this Arduino sensor shield 5.0V( 2nd attach.) I'm sorry i don't know how to better explain this. 
heres those drawings. not sure if it will help. L298 is 1st and the shield is 2nd and 3rd.
![0501162116[1].jpg](https://europe1.discourse-cdn.com/arduino/original/3X/3/7/3756ae08f351302941ef55411af3b1eebf458a7a.jpg)
![0501162124a[1].jpg](https://europe1.discourse-cdn.com/arduino/original/3X/9/3/936c6fa8a2ea2762e7ee5226ffac781b71103db7.jpg)