Are you referring to the Illinois FOID- Firearms Owner Identification Card? For Illinois residents, it permits them to purchase any firearm legal in the State of Illinois, with the exception of residents of Cook County, which has more restrictive laws in place.
Yes.
You will need SOME kind of LEGAL and VERIFIABLE identification to buy a firearm from a licensed FFL dealer.
No. Felons are prohibited from owning ANY KIND of firearm, including black powder arms.
no
Well you would have to be at least 18 in order to buy a firearm.
No.
No
Certainly.
Nowhere in the US.
A fid is a tool used to splice braided rope.
That depends on what state you live in (if in the United States), or what country you live in (if not in the United States), as well as exactly what kind of firearm you're looking to buy.
There is no such firearm as an STG 41.