You got the right answers. Here's where they are in the rulebook:
Rulebook page 6:
The quantities of the various Old World tokens are purposely fixed. If a given type runs out, no additional tokens of that type are placed while that stockpile remains depleted.
Rulebook page 20:
In each region with a Hero token, the player with the greatest Threat who also has at least one figure in that region must choose one of his figures in that region, and remove it from the board.
This process is carried out once for each Hero token present, one at a time. If, for example, one player’s last figure is eliminated from a region and other players still have followers there, subsequent Hero tokens in that same region will affect a different player or players.