1990 Honda Accord I was braking, then my brakes quit.

I have plent brake fluid. I have decent brakes. However, to day when I was braking, my car "jolted" in the rear, then my brakes crapped out. The pedal went soft. I checked the lines, nothing is leaking, nothing is loose. But, the emergancy brake barely wants to work at all. I know I will more than likley need to replce the master cylinder, bleed the fluid, replace it, etc....but I do not know how. I have not worked on cars in over twelve years. I have to get my 90 accord ex in safe condition before tommorrow. Can any one help? I don't have my manuals, owners or service. I do not know my way around really anything under the hood at all. Can anyone help?