no
No.
Depends on what the criminal mischief was for, and whether it is a misdemeanor or felony. You need to check with law enforcement in Ohio.
You need a lawyer for a legal and correct answer.
Pennsylvania does not have registration of ordinary firearms. There is no place or procedure to register a gun, whether inherited or not.
Ohio does not require a permit to purchase or possess an ordinary Title I firearm.
No
No. You do not have to register any weapon in Missouri. The only permit needed in Missouri is the permit to carry a concealed weapon.
You need a lawyer. You will have to expalin the specifics to get a legal, correct and current answer
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.
Go to your local police station.
Not to own a gun. Only to carry it concealed.