for the average person this will not be possible. you will need a transfer pump.. it cannot be done with any everyday pump.. only suggestion would be to use whats in the used tank if possible..
the average "grill tank" holds twenty pounds of propane. if you look at the collar of the cylinder it will have a mark TW: 17.1 or something close to this. This stands for tear weight, or weight of...
propane uses range greatly. The common uses relate to heat, whether it is for a propane gas grill, torch, water heater, etc. there are also some unusual uses like propane powered vehicles.