if you paid for field fee then they should, if you are just looking to get it filled then no, the compressors required to fill your tank are VERY expensive and require regular maintenance
if you're talking about the air tank, it should say on the side of the tank.
Definitely a tank before a hopper. If you go on Zephyr Paintball they have a 20 oz C02 tank for only 14 dollars and a proto primo hopper for also 14 dollars.
A compressed C02 tank or High Pressure Air tank propels the paintball.
You probably could fill it, but not to pressures needed for paintball gun operation, CO2 tanks should not be filled with any gas or liquid besides CO2. edit: you could use Argon in a HPA tank but not a CO2 tank
Where the air tank or co2 tank normally attaches
your local paintball field. Or you can purchase a scuba tank and adapter to fill the paintball tank with and every once in a while fill the scuba tank up if you live like out in the middle of nowhere
Take it to a shop! if you want to do it yourself the normal way is to put the bottle on scales and fill it from a larger bottle to a fill weight. To be honest though CO2 is well out of date. A smart move would be to move onto compressed air.
You should use HPA with a Proto SLG.
Take it to an airsmith or paintball tech.
No.
No, paintball co2 is much higher pressure.