Power Window problems of the 2002 Toyota Sequoia

In July of last year, my 2002 Toyota Sequoia experienced car trouble. The vehicle experienced 3 major problems. First, the rear window on the back of the vehicle would suddenly open all by itself. This self opening would occur at numerous times. The window would open when the vehicle was being driven, when it was stationary or even while it was unoccupied. The scariest however, was when the vehicle was being driven. Fortunately for me and my family no one was injured. The second major problem occurred with the door locks. The locks would lock and unlock themselves repeatedly without anyone touching them. This locking/unlocking would again take place when the vehicle was being driven, stationary or even unoccupied. The last complaint is that the gas gauge will drop to empty without any reason so there are many times that I do not know how much gasoline I have left in the tank. This too is occurring on a random basis. It's like the vehicle is haunted.