The Remington Vantage is a fine rifle. It has an adjustable trigger and is rated at 1200 FPS. The cost is around $135.
see the link below to see what owners say about it.
Colt makes a 1911-A1 Pellet gun made by Umarex. I know of no BB gun unless you are asking about an Air Soft gun. The Pellet gun is very good. I can not answer about an Air soft gun.
What do you mean replace Remington? There is no replacement for Remington,in my eyes Remington is a very good gun.
Yes, you can hunt squirrels with a pellet gun anywhere. EVEN THOUGH THAT IS NOT A GOOD IDEA!
Yes
It depends on the model and the caliber of the Pellet gun.
Yes
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.
Yes
No. Even if it would fit in the chamber, there is no firing pin on a pellet gun.