I need to learn how to design cars and schemes drawn on AutoCAD 2007 ?

i want some start in autocad with the simple layout of cars

I would create blocks for each major component (i.e. doors, hood, wheels, lights, body etc...) and create each of them separately. for example i would create the body by drawing polyline sections and then by using the loft command, create the general shape. i would then refine the shape by creating more 3dsolids and subtract them to get some of the contours in the bodywork.

if you want any more in depth guidance or any specific help just ask :)

Absolutely