It is a Smith & Wesson, possibly a model 17 K-22 Masterpiece. They were made from 1947-1993 (in the blued version shown in your photo) and are extremely good target guns.
Samuel Colt invented the first revolver. I'm not sure if it was a six shot but he invented the first revolver.
Impossible to answer without knowing who made it.
No more than 50 USD. For that, it would need to be NIB with all paperwork and a perfect box.
IF the revolver is marked ".22 LR" yes. If it is marked ".22 WMR" or .22 Mag" or " .22 WRF", then NO.
22 LR
That 22 revolver is IJ targeted sealed made in Pittsburg, Ms.
Only if it's a .22 Long Rifle revolver. It's not compatible with the .22 Winchester Magnum Rimfire.
A .22 revolver takes CARTRIDGES. Which .22 cartridge will depend on what caliber the revolver was made for. A .22 LR can shoot Long Rifle or Short cartridges, and a .22 WMR uses .22 magnum cartridges. They do not interchange. There are a few .22 revolvers that have 2 cylinders, and can shoot either cartridge.
CCI .22 Long Rifle- or any standard .22 Long Rifle ammo (there has been a major shortage of .22 ammo for a year now)
Your revolver is 9 shot revolver any speed loader made for a 9 shot 22 revolver might work but I have never seen such a thing
Yes
hjg