2001 Toyota Corolla electrical

I have a 2001 toyota corolla I Baught it maybe 20 days a go it was working fine until I was sitting in my house and my horn was going off shortly after that my stero headlights and interior light went out. 90% of the time now the car won't shut off and I have to pull the fuse for the fuel pump to shut it off it starts and runs fine but when I do turn it off my dash lights stay on and I can use heater wipers when the cars off