Points and condensor, tool set, breaker bar and socket to fit lug nuts, multimeter, oil, coolant (50/50), hand crank, tube patch kit or extra tube, jack and 2X6 for under jack, something to block wheels to keep them from moving when changing flat, jumper cables, first air kit, flares, fire extinguisher, flash light, AAA insurance, credit card.
If something breaks that you don't have parts for, add that to your parts box. If you find that you need a special tool, add that too.
Tour with a group so that if you don't have what you need, chances are that someone in the group will have it. Over time you will build up what to carry so that you can strike out on your own.
Start by making short trips in your town or neighborhood. Do a lot of these short trips and then gradually increase the distance.