How to go to Baidaling Great wall, Ming Tomb and Bird Nest and Water Cube from Beijing Days Inn Forbidden hotel?

1) Can anyone adv us how to take bus on our own fr Days Inn Forbidden hotel to Baidaling Great wall .
2) Fr Baidaling Great Wall to Ming Tomb by bus too .
3) Fr Ming Tomb back to Days Inn Forbidden hotel by bus.
4) How much is the bus fares for these places ?
5) How far fr our hotel to the Baidaling Great Wall bus station , possible to take cab for 5 person ?
6) How can we go to the Bird Nest and Water Cube fr our Hotel ?
7) Is the bus schedule on time fr Baidaling to Ming Tomb and Ming Tomb to our hotel, how many mins or hours for these buses to Ming Tomb bus station ?
8) Is it safe or worth taking bus to Baidaling, Ming Tomb for 5 person ?
9) Where and how do we buy the bus ticker with card reader ?
10) How do we know which is the legal bus to Baidaling great wall ?