Yes, you can buy a gun case for anyone.
No
No
No.
You don't need a permit to buy a gun in Oklahoma, if you mean concealed carry permit I think it depends on what crime you are wanted for.
In most U.S. states, yes.
probably a rifle but it might be hard to get a permit for a hand gun.
IF the pawn shop is licensed as a gun dealer. Not all are.
It all depends on the country where you live.
Depends on Texas law.
It all depends on the Country and location where you live. In the USA you must be 18 to purchase a BB gun, but no permit is required to buy one.
To purchase a gun, no. Anyone can purchase a gun as long as they meet the age requirement, aren't a felon, and don't have any disqualifying misdemeanors.