I always envisioned TJ as a tough mechanic type.. His gadgets are of his own design, he's the one who manages vehicles emlpoyed by "Evil Warriors".. But, he does not care for his own appearance, and that's why he is covered in rust, oil leaks from joints of his mechanical parts and electric components spark constantly... This also makes him look more intimidating... Cybernetics are patchwork of cannibalised and salvaged parts... Metal jaw is attached directly to his own heavily injured jaw, but is also equipped with mechanism which gives it increased strength.. There are various arm attachments, but mostly used are "lightning gun", hook and claw.
And, thanks for SLL too!
In the old cartoon he had a bazillion attachments, from energy shooting crossbow to fly swatter! Multipractic indeed!