Dead of Winter: The Long Night

Action dice belong to the player, not to a specific survivor: you receive 1 action die plus 1 per survivor you control but keep and spend them from your personal unused/used die pool (so you can spend multiple dice on one survivor or split them among survivors). (Rulebook p.8)

Yes — when resolving a crisis each revealed card with a matching symbol is worth +1, and each card without a matching symbol subtracts 1 from the total; if the final total is less than the number of non-exiled players the crisis happens. (Rulebook p.12)

You roll the exposure die immediately after a survivor moves to a new location and immediately after a survivor kills a zombie. (Rulebook p.11; example on p.9)

A bitten result kills that survivor and the bite then spreads to the survivor with the lowest influence at that location; that player may either kill that survivor immediately or roll the exposure die (blank stops the spread, any other result kills and the spread continues). (Rulebook p.11)

Zombies are added one at a time in order to entrance 1, 2, 3, etc., wrapping back to entrance 1 as needed; if the entrance to receive a zombie has a barricade, destroy the barricade and remove the zombie instead, and if there are no empty spaces or barricades the entrance is overrun and you kill the survivor at the colony with the lowest influence. (Rulebook p.13)

No — an exiled player cannot vote and cannot add cards to the crisis; they also cannot spend food to boost dice, and several other limitations apply (they draw an exiled secret objective and move their colony survivors to non-colony locations). (Rulebook p.11, p.14)