While you are creating a new thread you will get a box saying "Additional Options". From there you can create a POLL.
See 'Thread Tools' right above your post??!! Click it!!! And look a little more when you make a thread!! See that poll option??!!
when you make a thread, at the bottom you get that option to "add a poll" you need to select that. then you will be taken to the poll, and then you can set up the poll!