how do you use the kiosks at the movie and is that the only was to pay

You can pay at the kiosk. You can either buy them online and pick up at the kiosk or just go there to purchase. Both have prompts that you follow and it is pretty easy

As far as I know the only way to pay is at the window before you go inside.

I haven't used thr kiosk yet but last time i went i pay cash at the window

I haven't used the kiosk before i just pay at the window.