Firsts...
First firearm ever (and first shotgun): Savage .410, given to me by my father around age 13. I no longer have it. I think I sold it not long after my 16th birthday, when I got my first 12 Gauge.
First rifle: Remington Model 788 bolt action, chambered in .30-30, given to me by my father at age 17. Remington didn't make many of these in that caliber, so this one is a little hard to find. I'll never sell it; Dad refinished the stock by hand.
First pistol: Makarov IJ-70 in 9mm x 18 caliber, bought when I was 22 years old. I carried it up until this year, when I sold it in favor of a Smith & Wesson M&P 45. While I love my M&P, I really do sorta miss that Makarov. Fun, reliable little pistol!