It depends on where you are, but in the vast majority of the United States, you do not register handguns.
Yes, machine guns are better than Gatling guns because they fire more bullets faster than Gatling guns. Gatling guns need to have bullets and have to be hand cranked at the same time but machine guns does not need to be hand cranked. Machine guns only need bullets.
What kind of pellet guns? Airsoft or airgun? Either way, you don't need to have a license. For an airgun, i think you just need to register from the store you bought from.
18 for long guns; 21 for hand guns
It depends on your council by-laws you may need to register with your states Agricultural department.
You need a gunsmith
There is none
In most states you need to register at least 30 days before the election.
Well first of all you need to be at least 18 if you are in United States. Then you may register if you meet the right requirements and hand in your registration before the deadline.
Depends on the law of your state. It is not required under Federal law
you have to be licensed to sell hand guns.
To purchase, 18 for long guns, 21 for hand guns. "owning" is a term that you will need to ger a lawyer's help with.