The info cards should already indicate move and combat ability cost. Each ability on the UI, both when examining a follower/companion or when the mouse over an ability of the selection bar at the bottom of the battle screen, should indicate the move and combat ability cost with the white and red markers when you examine the ability which correspond to the markers on the left of the battlers on the map.
Amour Aquatic is a relatively easy quest for low level character. You will be able to free some prisoners to fight alongside you in the cells there. Den of Mischief is also pretty straightforward.