Using arduino make a item tracer

Hello guys,
i am new to arduino and i have a project named item tracer and i want to make a prototype model for it,but i don' know how to make it using arduino .please help me to make this model.

Please supply some more information.
What items are you trying to trace?
What is the expected distance do you want it to operate over?
Do you want a passive or active "thing" you put on your item?
How many items do you have that need tracing?

I want to trace items in the range of about 2-3 km,power source active and a single item not much more.

We don't charge by the word. How about providing a detailed description of your proposed project?

What is the item want to trace?

...R

The terrain or location where you want the 2-3km can have a very significant effect on the range of some RF based systems.

You might get 2-3km with a particular system in open flat countryside and less than 100M with the same system in an urban area.

Simple.
Attach a smartphone to every item, and run an app that sends the GPS coordinates to you every 5 mins or so over the mobile network. I'm sure such apps can readily be downloaded for both Android and Apple, so no work left for you other than charging the phones now and then.
No idea where the Arduino comes in, but the Arduino should be method rather than the goal, and not every problem needs an Arduino to be solved, even if it's posted on an Arduino forum.