Hi Yannada, generally car modeling is a highly complex task. You should be prepared to spend quite a lot of time working with different techniques and studying tutorials to make progress on that.

Some links to help you get started:

http://moi3d.com/forum/index.php?webtag=MOI&msg=1267.16
http://moi3d.com/forum/index.php?webtag=MOI&msg=898.2
http://www.carbodydesign.com/tutorials/?id=1196

I think there was also some kind of book printed a few years ago about car modeling using Rhino, that may be worth checking out as well.

- Michael