I have always counted my first family hand-me-down as my first car: Like DR Jrand75's first purchase, it was a Rambler American! This one was a 1964. It was handed down to me in the summer of 1968, and I drove it from Fort Lauderdale to Cleveland for my second year at school. I haven't found the color online, but it was kind of a light mint green.
Jumping ahead a bunch of years, the first new car I purchased was a 1980 Datsun 210, bought at Miller Datsun in Van Nuys, CA. That car transported me through a couple of Los Angeles lives and a Schaumburg, IL life, until 1987 when it was replaced by my beloved Nissan 200-SX.