I haven't bought it yet, but I plan to buy a 2002 or 2003 Subaru RS - fully loaded - at the end of the year. Price at about $21k.
Current vehicle is technically my parents, but I drive it: 1989 Chevy Silverado, ext. cab, 350ci.
If you are also including motorcycles as "first cars" then the first vehicle that I have bought myself cost $3600.