Q: Which type of wiring kit do I need to buy to rewire the interior fuse box?

My headlights have been shorting out for a while and I have replaced then multiple times. My wipers come on when I use the right blinker, my horn will stay on for hours, and my flashers come on periodically. Recently while I was driving home something smelled as if the wires under the dash were burning and my headlights went out first, then the parking lights and tail lights, then the dashboard lights and interior lights. The gauges continued to work though and so did the brake lights. I took it to a local mechanic and he told me that I had a short under the dash but that it would be a labor intensive job and the car wasn't worth the time needed to do the work. This is the only car I have and I have a friend that will help me fix it. He says I need a complete interior fuse box wiring harness kit but I can't seem to find one online and I'm not even exactly sure that I'm looking for the right parts. Any assistance would be greatly appreciated. Thank you!

My car has 119000 miles.
My car has an automatic transmission.