My other question is if a game is ended on a surrender then the player who caused the causality to be placed on the 'surrender' marker is the winner or does that just end the game and objective points are then figured out?
The player that caused the casuality wins regardless of the VP total. (The same is true if that player eliminates the last remaining enemy unit on the map.)
VP's only matter when the game ends due to a Sudden Death Roll or a player's last remaining unit is voluntarily exited off the map.
This is detailed in 6.3 of the rules. I know you said you didn't have it with you - but a PDF version of the rules is available both at GMT's website and here on the geek.