lube it and clean it, chances are that's what it needs, use paintball specific oil, no motor oil or wd-40
You are most likely low on air pressure.
No, all Cybrid markers are semi automatic and will shoot one ball per trigger pull. You only need to cock them after screwing in the c02 for the first time, and decock them after it has been removed.
Yes, reballs were made to be shot out of paintball guns.
Pressure in a paintball marker is usually referring to the tank, or the gun itself. Only HPA tanks come in variable pressures (3000-4500-5000 psi). The other pressure is controlled by a regulator, which is the operating pressure (150~200 psi) which is the pressure kept needed to fire and re-cock the gun.
When a gun starts to run low on Co2, it will nor be able to re-cock properly, sending the bolt out , but not far enough to catch, and will repeat until there is no gas. This happens to every gun e trigger or not.
To make it ready to fire.
You need to visit a gunsmtih.
You must take it to a gunsmith.
Yes, you will have to re-cock the spring every shot.
Firstly check if your tank still has pressure. Secondly if it uses batteries, check that they are full. If that does not work, completely disassemble and clean and re-lubricate your gun. Then take it to a shop if this continues.
No It is not a repeater , you must re cock and and hand load a pellet after each shot!
You will have to locate the source of the leak before you can fix it. Re-post with your findings.