There are different requirements for all activities that will reward you with unique gear. The lowest level requirement is usually around lvl 10, and the highest one, which often goes for Arena activities and complicated raids, is 70.
To get your TBC Blue PvP Set and enjoy all the perks of being a Gladiator, you don't have to waste all your time leveling up. Our professionals here at Classic Boost are ready to help you reach the right level, so you would play the game at your own pace without wasting your time and resources on the same activity. We've got your back!