1) What is the base you're required to be at?
All. 
Manila, Cebu
2) How many routes does the ATR fly to? Cities pls?
Multiplicity....and counting. 
3) As an expat, can I move my family there?
Its been done. 
4) Would it be safe to live in another city outside Manilla, on say an island somewhere and commute in for work? Is that even possible?
As long as you sign in and show up for work. 
5) What is the roster rotation.
huh? 