It depends on which company made it.
A 22 LR caliber pistol made by Walther, it is similar in design to the Walther P99.
Nope- not possible. The P22 is a blowback operated action, and is suitable only for a low powered rimfire cartridge. A .45 requires some form of a locked breech, which the P22 does not have.
No
no
$250-$350
WC9 is cast P22.
Cost, caliber and maker.
P22 Daddy O!!
No
No
Some people use a Walther P22 for shooting practice purposes, some use just for a day at the shooting range. The Walther P22 is known for being fun to shoot and no recoil. Some use as a gun to protect their family.