I'll assume TC. If you're not running at insane speeds, something budget to get you into RC would be a T2R. They aren't near as expencive as some of the other cars, and it would be very competitive. After you have some track time, then I would pick a type of car based on what you would like.
You want different stuff? Go with a Schuie or a Losi. You want the same as everything else on the market? Go with Xray, Associated, or Hot Bodies.
Seems to be a personal preference.