yes
no
Not in the United States
In most states, you just have to be 18 years old.
In most states you must be 18 years old
It depends on the model and the caliber of the Pellet gun.
In most states you must be 18 years old
I think you mean pellet gun. That is a gun that fires a small lead pellet but does not use gun powder. It uses compressed air or compressed gasses to push the pellet.
A pellet gun is not adequate for protection, and will get you arrested.
It all depends on the model and who made the pellet gun. I suggest that you re-post the queston with the model and make of the pellet gun to get an answer.
Any pellet gun should be handled like a real firearm. Yes you can be killed with a pellet gun under the right circumstances.
In the Unites States you have to be 18 to purchase a pellet or BB gun, but you can be any age to shoot it under adult supervision.
In the United States their is no limit, but in other countries their are limits on speed and power.
No. Even if it would fit in the chamber, there is no firing pin on a pellet gun.