Brazilians take the bus. Itamaraca and Porto de Galinhas are reachable by bus. Taxi for destinations in town (Olaria de Brennand for example). Local public bus or taxi to Olinda.
Anyone with a car and enough English to communicate is going to be calling himself a private tour guide and charging accordingly. In my experience, if there are drivers, they take a group of individual Brazilians; you would probably need to ask your lodging if they know of such a service.