I have 1369 ip, 400 rp
what would be a good choice for me if i plan to play 3v3? I was thinking teemo, cho'gath or fiddlesticks...but that is just because i saw them on youtube. I have only played about 6 games ever, most with ashe.

id have to say garen, jax, sion and singed are all relatively easy to learn champs that are strong picks in 3v3 for under 1350 ip

Teemo is pretty easy to counter, but maybe not at your summoner level.
I'd put my vote in for cho gath though, hes a fantastic champ.

I'd recommend Nunu, he is easy to play, has a nice heal, a good slow, a great noob-destroying ult and works well with most popular champs on this map. He is also only 450 IP

i play warwick alot on tt, and have a nice w/l ratio with him
his sustain makes him hard to kill
the large burst of healing from his q lets you escape ganks with less then 10 hp a lot
his e gives as to your team, which helps a lot
and his ult basicly makes tt a 2v3, and heals you back to full with the right items...

bruisers are greta on this map. you might want to hold out for some more IP. Xin is a great champ and easy to play but he is 3150.

I agree with Warwick. I think Ive only lost a single TT with him so far.

Jungle til you hit six and proceed to completely stomp the enemy team.

But if you are only interested in the champs you mentioned then definitely cho. He is an absolute monster on TT.

Play Singed and run around

I'd second Nunu, he's tough, cheap and easy to use. Plus you don't want to anger the yeti.

Garen.. SO easy to use..