2006 Mark LT 4x4 150k miles

I guess in order of what needs attention the most:

1. Brake Fluid Leak. Ill start to trace the lines tomorrow but does anyone have any expierence as to what a common culprit would be? Ill pull off the master cylinder from the booster and see if its leaking there also

2. Hiss/rubbing noise. Its coming from the engine bay, it reacts directly with throttle but it is there at idle also. To me sounds like something that is being driven by the engine isnt spinning properly. Where do i start?

3. Slipping in Rear end. Feel it when accelerating from a start and feel it even more on right turns, any chance its a hub beaing and the slipping im feeling is just the bearings not rolling right?

4. Squeaky. I feel like its coming from the bed, would loose bed bolts lead to it squeeking?

5. Reverse Sensors. When I shift to referse the sensors dont work and the off light on the button comes on. This happens 98% of the time

6. Window switches. Passenger window switch only works when it wants to and usually will work after the switch on the drive side is hit. (the driver can roll it down, and the passeneger can roll it up, but the pass cannot roll it down) The driver side switch is just as bad for the drivers window. motor? regulator? switch? any ideas?

Hopefully thats it for now, any help you guys can provide is appreciated

 

got the brake fluid leak sorted out. any tips for the others?

 

#2 sounds like maybe an intake leak?

 

I would assume that 8 years later, it's fixed or the truck is gone.