One would start by expunging them. Then contact a local attorney to make sure that there is nothing else left to do.
Generally speaking, no. A felon cannot own or even possess a gun unless the felons rights have been restored.
How di you get gun rights back in the state of California
It depends. The answer is too broad to answer well. If you have felonies on your record, you can only get a permit if you have had your rights restored. If it is misdemeanors, it depends on the state you are in.
Hire an attorney.
No
Not sure exactly what you are asking. If you mean, after getting a felony how long is it before you can purchase a gun, the answer is, never, unless you have your rights restored, which you can only do under limited circumstances.
Depending on what you lost them for, you very well might not be getting them back.
Get a lawyer. Get a lawyer. Get a lawyer.
Hire a lawyer.
please .
No
Possible. IF the felony was for violation of a state law. You will need an attorney, and petition for a pardon, with restoration of gun rights.