I have two wires from the power supply to my main panel and no ground electrode wire; how do I connect the ground wire from the main panel to the ground rod? The circuits? the receptacles? Also, how do I wire the panel box? now this what I did, I connected the neutral to the bus bar then connected the ground wire to its bus bar and linked a wire from the neutral bus to the ground bus. I took a wire from the bus bar of ground to the ground rod. what is your advice to these connections.
If you don't have one, you need a grounding terminal.
Wiring a panel is not difficult, but definitely check your local code to make sure that panel wiring isn't required to be done by a licensed electrician.
All of your other questions can be answered with simple Google searches. You should really do research on your own before asking very broad questions.