See the link below for the owners manual.
There are nine different versions of the 760 pumpmaster, see the link (below) and find your version. Check the parts manual for a diagram.
The model 760B has a scope rail built in. I am not sure about the older 760's, there were 9 older versions made. I would not go crazy and purchase an expensive scope for it considering the rifle only cost around $30, but yes it is scopeable. Crosman make a scope that fits the 760 and is not expensive. see the link below
They are inexpensive and not worth more than $5. However It's just fine for the 760. A good scope will cost you more than $100. To keep the cost down Crosman uses inexpensive scopes on the 760. Personally I would not change it out.
No the Pumpmaster has more power and can shoot BBs or Pellets
Check the scope mount makers web sites or call Remington.
See the link below.
See the Crosman link below for the diagram.
There are 12 versions of the Crosman 760. Which one do you want.... See the link below
600 FPS - Pellet 625 FPS - BB
11 mm dovetail rail
There are several versions of the 760. See the link below for all of the crosman models with dates and manuals.