Well the first gun that I ever had was bought FOR me, and that was 1998, when I was 8, it was a little Marlin .410 single barrel break action, that my father got me from a Walmart or Kmart...I've tried to find another for a LONG time now...kinda miss the thing.
The first gun I PERSONALLY bought was, well, I actually got two at the same time, a Yugo SKS M59/66, and a Yugo Mauser, I picked those out the weekend I turned 18 in 2008, and then picked them up 15 days later after CT's waiting period was up.