To do tasks you must go to appriopriate NPC and write to him/her:
Hi / tasks / name of monster in question by NPC / yes
First NPC is in normal VIP area:
Next one is in sVIP area.
The last one npc goes in sticket (spromo) area.
To find out what type of prizes are from each tasks and for how level they are, write command: !tasks. Remember that one type of task you can do until 3 times!