Try e-gunparts.com
50-100 USD or so
For a .50 BMG rifle, $3000 and up, with $3000 being just for a basic, bolt action single shot model.
$50-$100
All firearms that are in caliber .22 Long Rifle (LR) or 22 Long or 22 Short are rimfires. If you look at the face of the bolt, you can see the firing pin. If it is in the very center of the bolt face, it is center fire. If at the edge of the face, it is rimfire.
You need a gunsmith
75-125
Repost with the model number, and we may be able to give you an answer.
Try egunparts
1935
$50-$100, depending on condition.
Sign up for a hunter safety course. This should be a single-shot bolt action rifle, about the simplest firearm action there is.
wal-mart