Seek out other pro pianists in your area and go see them perform. Try to talk to them and put your questions to them directly because they know your area and may have gigs they can turn you onto. What you charge is a matter of what your market will pay along with what your skill level as an entertainer is worth... we can't really answer that for you but your local pianists can.
[This message has been edited by Esh (edited 06-10-2006).]