[civickiller]

well at first youll need to pump the brakes to refill it with brake fluid. and you also do need to bleed your brakes, you dont want to risk any air in there.

to bleed the brakes, as you are pushing the brake down open and close the bleeder valve quick, do this until no air comes out.

as for the noise, jack up the front and spin each front tire and see which one is making noise and where it is coming from. actually it sounds like the brake warning, thats weird. but yeah