If you mean how old do you have to be legally, it depends on the state. Most states require the person to be 21 or older, but some states issue permits to people as young as 18.
If you mean how old do you think it should be, that is a matter of opinion.
Driving and permit ages vary by state in America.
If your rights have been restored, yes. If your rights have not been restored, you can't get a gun permit anywhere in the U.S.
Contact your local police.
Driving permit? Gun permit? Building permit?
It depends on where you are and what you mean by gun license. If you are in the U.S. and you mean a permit to carry a gun, check the related link for information.
Depends on Texas law.
Follow all applicabe laws where you live.
14
You should be 23yrs old to work
The state of Illinois does not issue carry permits, so it's illegal at any age to carry a gun in Illinois, assuming you mean out in public with a gun permit.
11
There is no should in buying a gun. Federal law says you must be 18 for a long gun and 21 for a handgun.