Reflection - Can I put a reflection on every image on my page?

There is not one direct answer for this question, if you mean with just one stack, and including all images from banner images included with the theme, then no. But all images in the content or extra-content areas can have a reflection on them. They just need to be put in a stack with the Apply FX setting set to All Images Added to Stack or you will need a separate Reflection stack for each image.