The Bahamas is expensive, expect to pay approximately 10% or 15% more than in USA for the same things. American dollars are received everywhere, and if you pay in cash, many sellers will not charge you tax.
There are many forms of transportation available in Freeport. Taxis which are available at all the major tourist stops discuss a flat rate before the trip depending on how far you go and number of passengers. There are many tour bus services available to give you a tour of the city of Freeport and highlight its features which may be more difficult on your own. Rental Cars is another option to see what Freeport has to offer.