If you have turn signals then I suspect you have a problem with your brake light switch attached to the brake pedal. Plunge it in and out to see if your brake lights work. If that fixes your brake light problem you can turn the two nuts on the plastic threads of the switch to adjust it's operation.
Your tail lights are probably a result of a bad light switch (the contacts inside he switch wear down with age). However if the lights work up front but not in the back then I suspect it is a rear wire harness problem that you are facing.