arriving beijing capital airport in early morning 0200 hr.

1st question = where to get a taxi/taxi van with 5-6 seater at the airport ?any sign to show whereabout to get taxi ?
2nd question = we are 5 persons definitely we require 5-6 seater taxi van and how much it will cost to reach Lee garden service apartment in Jinyu Hutong , Wangfujing
3rd question = Is the taxi fare price based on the meter or simply through dealing with the taxi driver4
4th question = please confirm that the airport express train start at 6.20 am and it goes to Dongzhimen subway station from airport. how far is the Dongzhimen station to Lee garden apartment and is it easy to get a taxi outside the station and how much it cost to go to the apartment.
Thank you.
awaiting prompt reply to every questions ask