I've never heard of a juvenile record keeping somebody from exercising other civil rights. A juvenile court disposition is not supposed to be a "conviction" in most states. But for a real answer, consult a lawyer in your state.
No
In general, any felony makes you inelligible to own a handgun.
The most basic answer is no, if you have a felony, you cannot legally buy a handgun, regardless of the age. However, it is possible to sometimes have some of your rights restored, so you may want to check with a local attorney familiar with that process.
The crime of escape is a felony in most states. Escaping juvenile detention is not a felony per se, but a prosecutor could chose to prosecute a juvenile as an adult for escaping, and then it would be a felony.
If conviction was for an offense that would have been a felony if committed by an adult, then no.
It depends on what the details are. If you have no felonies or misdemeanors on your record, you should be able to buy a handgun. If you were arrested for something but never convicted, or if the charges were dropped, you can buy a handgun legally.--------------Added: The questioner doesn't reveal in the question if they were arrested for a felony offense or not. If they were, they would not be able to legally possess a firearm until the case was adjudicated one way or the other.
Federal Law states that if you were tried & convicted of a felony as a juvenile, you will be able to purchase a firearm as an adult. Generally speaking, no. If you have a felony on your record, you cannot legally buy a firearm unless you have had your rights restored.
Nope
Generally speaking, no. You can't own a handgun if you have any felony. It is possible, under some circumstances, to have your gun rights restored.
Federal law says you have to be 18 to buy a long gun and 21 to buy a handgun. Find a lawyer familiar with firearms law to get a correct answer to your registration question.
It depends on what the crime is that is on your record. If it is a felony, you can't legally own a handgun anywhere in the U.S.
I think the only way to expunge a felony is if it happened when the person was a juvenile and found guilty as a juvenile. If it happended as an adult I dont think they can expunge a felony.