HO Auto Reversing track

[Scott1943]

I have a small village that I set up at Christmas.  I am looking at getting Streetcar 80202 to run back and forth on a small area.  I saw item 44547 with lot of reversing equipment.  I area I have is 72" Long X 15" wide that I would like to run the streetcar.  I think that seven 9 " straight track with a bumper (44591) at each end is all the room that I have. How many straight reversing track pieces do I need?  Can I use my standard HO transformer or do I have to have a DCC power unit.  Also the 80202 can have an aftermarket sound system installed but I have know idea what I should be looking for to put sound in to the streetcar.