German or Italian. Most likely Italian
The Crosman model 150 was made between 1954-1967. It is a .22 cal pellet pistol.
Glok 22
Yes.
Impossible to identify without a detailed description of all markings.
No it will jam in the barrel.
Possibly Herbert Schmidt
50 or so
about 250 dollars
french made nice pistol
Mod.T 18 22 l.r. F.I.E
1946