If you need a rental car, your best bet is to grab one from Raleigh-Durham airport (RDU) or there are a few companies within the downtown area.
The GoRaleigh bus service currently serves local and regional buses and is headquartered downtown at the GoRaleigh bus station in Moore Square (214 S Blount St, Raleigh, NC 27601).
If you want to explore Raleigh on two wheels, Citrix Cycle is the local bike-share system in town.
BikeRaleigh has maps showing bike lanes, sharrows, greenways, and GoRaleigh routes, as well as preferred routes that are based on bicyclist feedback and street conditions.
Parking options for downtown Raleigh include street parking, parking lots and parking decks.