It all depends on the final destination laws and regulations.
It depends on the country where you live. Where I live pellet guns don't have to be registered.
This all depends on the country and location where you live.
It depends on the model and the caliber of the Pellet gun.
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.
No. Even if it would fit in the chamber, there is no firing pin on a pellet gun.
Nope. Pellet guns are fairly safe to use.
Over what border? From one state to another or to another country. If so then what two countries? It's best to check with the laws of both countries before you make a big mistake.
No. A pellet gun would use compressed air.
Use C02 to propell the pellet