I created a Poll but it is not going to my home page. Am I missing a step? Thanks.

Did you put a checkmark in the box to make it active?

Michelle hit it right on the head. You created your Poll but left it inactive. Click on Edit Site pages, click the Edit button next to your Home Page, and check the box in front of your Poll to activate it.

How do you save previous poll results on the website? I'd like to show previous polls when I'm ready to create a new one.

For now you'd need to hit File, Save when viewing poll results before starting a new poll. Or copy and paste your results to another page. Many Admins do that actually.

The Poll was really built as an entertainment feature -- it's there just for kicks. If you want to do a more real form or survey and track results, save them, share with Classmates, etc., you should use your Survey Maker instead.