Joe, the tendency of the new guy is to buy every gadget the local hobby shop or tower shoves at them. But if you check what the experienced life long modeler brings to the flight line, you will find very little that is not needed, because we got tired of carrying the excess stuff around.

As John shows in his post, a simple fueling system with a manual pump - personally I like a good peristaltic pump that allows you to keep track of the amount of fuel you used on the previous flight by counting the number of crank turns.
Then a glow plug system, there are many to chose from. Finally, a starter with the battery mounted to it like the one John showed. 18 Volts John, that will turn with some real enthusiasm. I built my first one almost 30 years ago with a couple nicad car packs, but there are also many commercial ones available today. Then make a simple small lightweight box or tray to hold the transmitter, starter, and plug driver so you can carry the airplane in one hand, and everything else in the other.

Back in your pit area, you need the cleaning supplies, fueling system, and tool box. You don't have enough tools until you are not borrowing lots of stuff. You have too many tools when everyone is borrowing your stuff. Finally, take along the odds and ends to do minor repairs, replace lost wheel collars, broken props and the like. Keep flying and you will soon find a balance of what works.