Hi im not new in electronics, but im total noob in microcontrollers so i have a question
if i want to start learning proggraming i have to built arduino serial single sided board and connect it to my pc com port and i will be able to program it?
Yes
and i dont need some kind of bootload at first? coz in one forum i asked and evverybody is telling me that i have to make this
http://electronics-diy.com/avr_programmer.php
then use it to program serial arduino board and only then i will be able to use it
If you did not buy a ATMEL chip with the Arduino bootloader already on it... yes, you will need to build/aquire some form of an ISP programmer and install the bootloader before you can use the Arduino programming method/IDE.
ok, if i built that avr programmer and connect it to arduino, what i have to next? i mean wat software i have to use to bootload avr and how should i do that?
If you buy an Arduino or Arduino-clone it comes with the bootloader pre-programmed. Everything works out-of-the-box, (I suspect the most tricky part is installing the USB/FTDI driver if using a USB Arduino)
If you buy a replacement AVR chip you will have to do the bootloader thing, but many sites sell them pre-programmed with the bootloader. This is only really useful if you are building your own controller board.
im not goin to buy the kit, im goin to built my own, so i will need to bootload it first so how i have to do it? just make this
http://electronics-diy.com/avr_programmer.php
bootload the avr and thats it? 
I built this one:(http://www.arduino.cc/en/Hacking/ParallelProgrammer), and have used it more than once. Recently, I used it to program an atmega328 with an arduino bootloader.
When you open the arduino IDE, click on Tools, then click on Burn Bootloader, You will see four choices of programmers to use. One of them is for parallel programmer, that's the one I used.
If you want to build an arduino kit, look here:(http://www.moderndevice.com/products/rbbb-kit)
pakrat thanks, this is just what i was looking for!!! al parts for the arduino im going to buy from electronics shop near by me