If u got a green set and it has, for example +33 def and +10% attack speed
and u got the helmet, suit, gaunlets and boots does the 33 def +33 def for just 1 of the clothes or all of em:confused: :confused:

If you mean the set bonuses (listed in green): these are given once. They are listed with every piece of the set, but they asre actually the result of you wearing these set pieces. So they are listed on every piece, but you just get them once.

EDIT: and while we're talking about sets. there's also weapons with the name of sets (it might well be that every set name is also used for a weapon), such as Comet swords, Sayram sticks or Miragle yoyos.
I've occasionally seen people trying to make it look like the weapon is part of the set, to skyrocket the price for the junk. These weapons have nothing to do with the sets, hence there are no bonuses.