Sorry to burst your bubble, but the best transportation for you at this stage of life is probably a bicycle. If you can’t afford a reliable car, then the insurance, maintenance (and campus parking fees) will just eat up all your spare cash. Save your money until you graduate and find a job to pay for something better.
The longer you go without a car, the better you are.
My tip for buying one is to buy a cheap car that will last. A cheaper car will have lower insurance as well.