96 Ford Explorer Eddie Bauer Electrical Problems. SO MANY QUESTIONS...?

Ok so When i first bought the explorer only one headlight worked on low, both did on high beam. The brake lights worked fine a month ago when i bought it too. Recently my brake lights stopped working all at once. So i checked fuses replaced brake switch and changed bulbs. None of that did anything. So now i am driving without brake lights and i hate it. Anyways well the back windows dont roll down from the back seat door button. i can roll them down from driver seat. Ok well two electrical problems so far. Well today i was driving and my headlight on the driver side went out and the other one will only work on Bright. I got new HID's that i want to install but to me this car sounds like it has major electrical problems. What can i do to fix these problems and how much do you think a shop would charge and how long it would take to fix these issues. What do you think is causing the issues? Thank You96 Ford Explorer Eddie Bauer Electrical Problems. SO MANY QUESTIONS...?Check all grounds under the hood, also does it have the lamp fault indactor in the lower center console? If so it may be bad, seen drinks spilled and short it out