Don't mess with the brake line from the master cylinder. Tighten it and don't mess with it. As jacked up as I sounds like you have it you might try and gravity bleed it. Crack the bleeder on the caliper and let it run into a catch pan. Keep the master cylinder full. That'll flush out any old crap too. After doin that for a bit bleed it like the other guy said. If you can't get it to pump up you can try and crack the bleeder, push the pedal down, till it stops, then close the bleeder, let up on the pedal and repeat. You just want to make sure you don't let up on the pedal at anytime while the bleeder is open. You'll suck air back into the system. Which is what you're trying to get out.