They usually give you warnings
I'm not extremely familiar with California gun laws, but I don't think anyone in California is allowed to posses a non-registered firearm.
Absoutely not.
Second Amendment
If it's a felony conviction, no.
No.
Since there have been several different models of "Tommy Guns", you will need to find a Class III Dealer that can obtain the correct parts for the model gun in question. There is also the little issue of having ALREADY registered your full auto with the BATFE. If not already registered back in May 1986, it cannot be registered- and possession of an unregistered full auto firearm is good for 10 years in Federal prison, a fine of $10,00, and loss of your rights to ever posses ANY firearm.
Not in Virginia, nor anywhere else in the United States.
Of course you can. However, you need a license to posses a firearm, which is obtained from the police. If you can show good reason to posses one, and you meet the criteria, then the process will only be about 28 days,
Never. A felon has lost the right to possess a gun.
Very generally speaking, in the U.S. a felon cannot own or posses a firearm unless his or her rights have been restored.
I believe Federal Law does not allow you to posses a firearm of any type, if you have ever been convcted of a Felony.
You didn't really ask a question, but here is some information: Generally speaking, no felon may own, posses, or have constructive possession of a handgun or other firearm, regardless of whether is was a "serious" felony. HOWEVER, There are exceptions to that. In a few states, felons can petition to have their rights restored - but it is only valid in THAT particular state. In that case, the felon CAN own or posses a firearm.