Electrical problems. Please help

I own a 94 accord lx. Auto. 180000 miles on her. I bought the car off of a family member for a steal. About 8 months after I purchased the car the horn went off in a continuous annoying loud beep. The lights on the interior of the car started flashing like disco lights. Now, two months later after about 294894 people have looked at it, there is a list of things gone wrong:
-the right headlight is the only one that works, unless you put the highbeams on, then they both work
-the right reverse light is the only one that works
-interior lights are out
-rights signal light stays on
-when you signal, the interior lights blink with the rythm of the signal
the car had come with a stock factory alarm, which my sister had lost. Someone had mentioned that might be the problem. But other people suggest that it has something to do with the wiring by the front driver fender, which I was told was once removed to fix some wires that run to the ground. Pleasssssseeee help me:)