Everyone has their favorites; you'll get as many answers as there are cars. Anyway, I like the Miata/Eunos Roadster, personally, as a first car. The Trueno's good, too (and a lot of people prefer that one).
Also, if you want to give it a try, see how well you do on the B license before buying a car. If you manage to get all golds, it'll give you a Miata LS, which is the higher powered version.
How far did you get before your friend deleted the game?