rear brake adjustment is there such a thing?

cleaning you can do yourself with some spray. About the adjustment, I dunno.

P.S. it would help if you told us what kind of car you have and what type of brakes.

If you have drums in the rear, you can get some adjustment out of them. If your E-Brake is not very tight, adjusting the drums will tighten it up.

I have a 96 toyota tacoma 2.4L. How hard is it to clean and adjust?

if you have to ask us, dont do it.