Switching from primary residence to rental

[Jason Reynolds]

I am moving, and am looking to rent my current home, at least for a couple of years. There is a considerable amount of equity in the home. It has been my primary residence for five years. I have some questions at so how that affects me when tax time comes.

When this property becomes a rental, and then I sell it, will I have to pay capital gains?

If so, will that be only for the appreciation after it became a rental, or the entire appreciation?

What forms should I acquire/file to position myself best for taxes/risk?

Should I get an appraisal to cement the value at this time, for future reference?

Should I do a cash-out refi while it is still my primary?

Thanks in advance for any help you guys can provide.