Impossible to identify without a detailed description of all markings.
Possibly Herbert Schmidt
Inexpensive.
$75-100, depending on condition.
German or Italian. Most likely Italian
NO
A pistol that fires .177 diameter pellets.
Benjamin model EB22. Crosman model 2240. Benjamin Marauder Air or C02 Pistol. All 3 of these are .22 cal C02 air pistols, There are several others but they are spring or pneumatic not C02 systems
Yes.
My grandfather's pistol used in ww1
No it will jam in the barrel.
if a pistol, tnen the same way as the military 45 cal pistol
if it's a revolver......32 cal revolver ammo if it's a pistol......32 cal pistol ammo