No. There are no state requirements for registration.
Yes, just need proof of insurance!
Impossible to answer without more details.
Depends on how old Montana is.
You need to register it in Alaska even though your father let you borrow a gun until you can get one.
No. Like MOST states, it is not required. Link to a summary of Louisiana gun laws below.
Pennsylvania does not have registration of ordinary firearms. There is no place or procedure to register a gun, whether inherited or not.
There is no registration of ordinary Title I firearms in Indiana.
You would have to go to your local gun shop and register your firearm there. Then, after completing that, you would have to go the gun range and register yourself there, with your gun permit.
Depends on the law of your state. It is not required under Federal law
Depends on where you are. In MOST of the US, there is no requirement to register an ordinary firearm. There is also no place to register a gun- on line or otherwise.
Depends on what state you are in. In MOST of the US, there IS no requirement to register a gun.