How the hell do you put a poll on your website?
Uh, use google for simple questions like this. It isn't hard information to find.
You need a script to do this, and it'll need a place to store information sent by the visitor. Generally you're not going to be able to do this with a free site, so there are places that offer free polls that display ads and relay information between your site and theirs. I used to find lots of great free stuff for websites at http://www.thefreesite.com, you should find a poll somewhere in there.
If you got a PHP supporting webhost, PM AJA about Poll 'o Matic ;D