No
Yes
No. Minnesota requires a transfer permit for handguns.
Yes.
You get and NFA Class III permit and buy a suppressor.
In MOST of the US, a permit is NOT required to purchase a .22 rifle. IF one is required in your area, it is because elected politicians passed a law that says you need a permit. You would need to ask them why they did that.
probably a rifle but it might be hard to get a permit for a hand gun.
Legally, no. You must be 18 to purchase a rifle or shotgun, and 21 to purchase a handgun.
Federal law is 18
No, the permit system only pertains to handguns. To buy an ordinary Title I rifle or shotgun, you simply go to a gun shop, fill out your Form 4473, have the NICS background check phoned in, and pick up your firearm. Now for pistols, you either need to purchase pistol permits from the Sheriff's Office of your county, or have a North Carolina Concealed Carry Permit.
No. You must be 18 to purchase a rifle of shotgun. yes at 16 in Indiana you can buy a shot gun or rifle from a gun store without a permit I live in Indiana so I should know.
Yes the background check for guns is the same in every state