1995 Chevy Silverado tail lights; brake lights; rear turn signals

My rear tail lights are not working,
my rear turn signals are not flashing
my front turn signals are flashing very FAST
when I press on the brake pedal, the rear brake lights do not work; except the small brake light over the cab does light up.
Hazard lights work fine on the front of the truck, but the rear does not.
i have also noticed that my radio, door buzzer, and inner dome light are not working either.
i have replaced all the bulbs on the tail lights.
is this fuzes or do I have some electric issues? Please help?