1.Taekwons can't use weapons.
2. To use the kick skills you have to prepare them first. if you put 1 skill point in whirlwind kick you should get another skill, "Pepare Whirlwind Kick" put a skill point there and use it. you will see a "buff" at the side of your screen. then attack an enemy with normal attack until you see that he is preparing the skill, use whirlwind skill now (not the prepare skill).
3. to become a star gladiator just get 40-50 job lvls (i recommend 50) with your taekwon and go to the job changer. choose star gladiator xD