Carnival Pride Prices?

My boyfriend and I are first-time cruise goers. We are going on the Carnival Pride from Baltimore to the Bahamas in Mach 2011. What i would like to know is if anybody knows the prices for sodas and beer (just a general beer such as bud light) on this ship. Also, any other expenses we might come across. Does it cost money to get off of the ship at ports just to say walk around and explore? (I know it costs to do the activities such as playing with dolphins etc but does it cost to just get off the ship period?) And any other expenses! :) Thank u!