Wiring problems of the 1996 Toyota RAV4

I got the car off of my brother for $4,000. 00, it looks great, never ever been wrecked, paint great, brand new tires, new exhaust, new brakes, etc. I was waiting on him to get the title noterized and he brought it over today, but this morning when I shut the door in the driveway, the fuse box bursted into flames, both windows came down and luckily I had a large fire extinguture in my house and was able to put the fire out, otherwise it was parked between 3 buildings worth 1/2 million $$$ and surely would have burned all 3 down if I had not had the ability to put the fire out. The flames were as high as the window and the car a total loss as all the wiring burned up in less than 2 minutes in the fuse box area. If this had happened on the highway, I am sure it would have been disasterous and at the very least the entire car would have burned up. I am 55 years old and this is the very first car I have ever owned that caught fire.