I have just ordered Setting the East Ablaze and Red Dawn Rises so am committed to starting BoB now

No figures bought yet, but I am working on a list. To help me avoid a false step, can someone tell me what I should be buying to use at least some of the scenarios in Red Dawn Rises? Reds, obviously, but will I need just Whites or are there scenarios involving the Chinese, British and Emir of Bokhara, and does the Mad Baron make an appearance?
Similarly, is there any special terrain I should be thinking about ordering?
Thanks in anticipation.