I recently completed my PPL on 47 hrs, and it cost me £10,700, which included all books, whizz wheels, plotters, exam fees, CAA fees etc. Along the way I treated myself to a handheld radio, a stopwatch and a pair of Dave Clark headphones (£125 secondhand off eBay).
I did my training at Shoreham (so think expensive landings, touch and gos and go arounds
) I also did it in a PA28, so I reckon you could knock off £2,000 if you did it in a Cessna 150.
Good luck
Nik