Buying calling card in Beijing airport and other transfer information

Hi, I would like to know if I can purchase a calling card that I can use at a pay phone once I get to Beiijing Airport to communicate with the school in Dongying where I will be teaching inside the airport? and if so will the instructions be in English. Also, if my flight arrives at 4:00 p.m. (once I go through customs 1/2 hr to an 1hr) what time would I catch the next bus? where is the location? how much does it cost? and does the bus have sufficient room for large piece of luggage?