To change the gold awarded you need to change the values in the object editor under your unit. Change the feilds "Stats - Bounty awarded", "Stats - Bounty awarded - Sides per die", "Stats - Bounty awarded - Number of dice". Also, in the trigger editor use this action in your map intilization trigger, it's under the action "Set player flag", the action is "Pick every player and do turn Bounty on for (Picked player)". You can also make it for only one player or only for a few players.