Warped rotor is the most likely cause.
could be right in front of the battery - that's where it is on my 89
Rotors out of round?
Front pads (disc brakes) Rear shoes (drum brakes)
All four brakes should engage at the same time. You probably need to bleed your front brakes. If road conditions are wet or you haven't driven the car in a while, drum brakes sometimes "grab". Many cars have rear drum brakes and front disc, this could be what you're expieriencing.
front front - rear rear.
The front brakes on any vehicle do most of the stopping. When you apply the brakes the weight shifts to the front of the vehicle. For this reason the front brakes are needed more than the rear. Try stopping a vehicle with just the hand brake which applies only the rear brakes.
Front brakes have significantly more stopping power than rear brakes.
Yes.
Of course. All vehicles have front & rear brakes.
There are no emergency brakes on the front wheels of vehicles.
have the back brakes checked sometimes they can sound like the front
It is not necessary to break in brakes.