Yes, But first determine if it's worth it. Some inexpensive pellet guns are not worth rebuilding. Marksman makes a line of inexpensive air guns and rifles that are not considered very high in quality and may cost more to rebuild than they are worth. However Beeman (Who Owns Marksman) makes very good air guns and rifles, and would be worth the effort to rebuild one.
There are several air gun shops around the country that make a living repairing older air guns. You can do a search on the web for "Air gun repair" and locate one that works on your model. Unless you are very handy with tools I would recommend one of there shops, rather than tackle the job yourself. Crosman offers a link on their homepage to independent shops that repair Crosman, Benjamin and Sheridan air guns. All these brands are owned by Crosman.
So yes most air guns can be rebuilt.
Crosman offers a service to locate a repair center for their older guns and rifles. Click on the link below and then at the bottom of the page click on "Find a service center" it will direct you to someone who can rebuild your Crosman pellet gun.
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.
See the link below. Parts are still available from Crosman. I've rebuilt 5 of them with new seals.
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.
No. A pellet gun would use compressed air.
Use C02 to propell the pellet
The Crosman Recruit is a pellet rifle not a pellet gun. If you want to see how the rifle is assembled then see the link below for the diagram.