Just for the sake of context, let me quote the rulebook:
Finally, each player reveals the mission he or she chose and, according to the icon, adds Victory Points for: So, as you say you will get extra points for each card you have with the same symbol as your mission card. If your mission gives you 3 points and you have 2 cards, you get 6 extra points!
· Each card with the same symbol as the mission card.
· Each survivor rescued.
· Each vampire as a trophy.
· Each dead player.
For the other missions, you were right: you get points for each survivor you rescue, for each other dead player (yeah, they have to die!) and for each vampire you collect as a trophy.
Let me know if you have further questions!