[ivymike1031]

Hmm, well we used a test light to do the tests you mentioned when it broke down, and the battery we were using was out of my personal car and it is still fine

The positive cable does not conduct anything. We even bypassed the battery cable by hooking a jumper right to the starter, still nothing, no interior light, no electricity is making it to anything.

These two statements are inconsistent.

Do you have the following answers (yes or no to each)?

test light turns on when you connect it...
* across the battery terminals
* from (+) on battery to body of car
* from (+) on battery to engine
* from a socket on the fuse box to the body of the car (test all sockets until you find one that works)