I bought this thing for like 500 tc and i dont know how to equip it , can someone enlighten me please :P

You seem to have activated the item yourself.

If it still does not show up ingame, all you need to do is type /dl JoesDark
After that, restart toribash and you should see your item (Or you can just type /lp 0 JoesDark)

Thanks for your help

Step 1:go to deactivated
Step 2:click activate on the side of the thing you want to choose
Step 3:after you click activate go on to toribash
Step 4:thats it it should be on your toribash fighter