It all depends on the model.
Follow instructions provide with the item. If you don't have them, contact the maker.
Contact the maker for a replacement manual
The Crosman 120 is a rifle not a gun. It is a break barrel. Cock the barrel all the way down and load a pellet into the rear of the barrel. Pull the barrel back up and it' is ready to fire.
please state the make and model. It will make it easier to answer your question.
This is a break barrel air rifle. Push the barrel down to open the breech and then load a pellet in the barrel. Pull the barrel all the way down to load the tension on the spring then close up the barrel. It's ready to shoot
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.
Any pellet gun should be handled like a real firearm. Yes you can be killed with a pellet gun under the right circumstances.
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.
To load pellets into a Marksman Repeater, first, make sure the gun is not cocked and the safety is engaged. Open the breech by pulling it back until it locks into place. Place a pellet into the breech, skirt first, and then push the breech closed until it locks. Finally, disengage the safety and aim the gun in a safe direction before firing.