Rooms like the Royal Suite, Ambassador Suite and Presidental Suite include 2 way complementary transfer.
Yes, for a very cheap price of 130 SGD per eat with pick up. excellent service
MRT is the way to go
No it does not. However, Changi Airport has a counter at the general terminal area that provides various options for transport.
Not that I know of but in Singapore transportation is very easy. There is the MRT or Uber or Grabcar.
Get an answer from InterContinental Singapore staff and past guests.