Ok, tried something that may not have been smart.
I attached the jumper wire from the + batt post, then clamped the other end on to the starter + post.
When I did this, flashers came on, everything else in the car came on.
Then I tried to start the car. Heard clicking, rattling, car didn't start. Tried it again, same thing. Once more, and then I got nothing. Maybe I just made the problem worse....