Welcome to the forum.
Check fuses for those items first. If those are good and the accessories still don't work, more information will be needed regarding the build and options of your vehicle. Look through the owner's manual to learn how to turn on/off park assist, too.

 

I've been disconnect battery post for about a week now check fuses all where good park assist still on and radio not playing what should I do r how do I reset

 

Might not be anything to reset. Those items could be broken. Have them checked by someone knowledgeable about the systems.

 

Thanks