If your TV is not movie ready, is there a way to use Amazon Fire and Amazon Prime to play movies?

I'm not sure what you mean by 'movie ready'. Is it an older television that isn't HD? Technically you can use streaming devices (that play Amazon Prime) on older televisions. You just need an adapter that attaches to an antenna out, rather than HDMI or component cables. For example, I stream amazon prime through my Playstation 3, which can be connected to a tv with almost any kind of cable. If it's an antenna cable, it just has to be specially purchased because they don't come with the devices anymore.