I am a level 23 troll hunter and I need a cool set armor. I don't want to look like a noob having noob items and the look. also suggest a good pet please thanks

What you need to do is constant dungeons. Do as many as you can every time you play and you'll be in fantastic gear. A good set even though it might be a little low level is the set of armor out of wailing caverns. Each boss drops one piece.