Gun shop, pawn shop. Values for starter pistols are typically very low.
20-50 USD
Check with a gunsmith. These were inexpensive guns to start, and there are not many sources for parts. Depending on the part, a smith may be able to make one, but the cost may exceed the value of the gun.
Your pistol is commonly known as a "starter gun"- as in the start of a race. .22 caliber BLANK ammunition can be found at most larger gun shops. Please do not ever attempt to fire anything EXCEPT blanks in your pistol.
make should be stamped on pistol
TBI - "Trail Blazin Innovations" - is among several companies which carry and market blank ammunition. See related link 'TBI - blanks, blank ammo'
Unsure what you are seeking. These were an 8 shot swing-out cylinder 22 BLANK revolver, made in Italy in the mid 1960s. They are not capable of firing live ball ammo safely, and retail for around $25.
50-150 or so
Tanfoglio of Italy.
50 USD or so
Seldom exceed 125 usd
IIRC, it was made in Italy
Made in Italy. 50-150 USD