What kind of glue should I use to make my pop up book?

You usually only need one or the other. Really it's whatever you like. I personally like primer better, but it is up to you. Try both and see which one...

Gorilla Glue works best for the cracks. Be sure to get the clear glue, otherwise you will have yellow all over the lens.

A good quality regular super glue, or better yet, a gel glue like Loc-Tite. Tiger glue is also good quality.

I would use solder. Spread it thickly if you want it to stick well.

Yes, but it's not really worth it since you will be adding shaving cream. The lotion, shaving cream, and foaming hand wash will make the glue look white, instead of...

Hot glue or super glue would be your best option.

You can use clear glue, or any type of liquid craft glue. If you use a glue stick you will have to microwave it.

Use a special spray adhesive for interior carpet that is available online or in stores.