i am very intresting in modeling my first car, but cant find any website that gives blueprints for free
You do not need blue prints, use photographs imported onto the work planes. Then you sketch round the profiles.
as here; http://www.solidsolutions.co.uk/solidworks/Tutorial-Videos/How-to-Model-a-Jaguar-E-Type.aspx
Answered with a tutorial: https://grabcad.com/tutorials/how-to-get-blueprints-of-various-cars
Official blueprints of anything (at least anything currently being made or even older advanced military vehicles) are almost always proprietary information that isn't available for the public.