We only painted around the edges because we are covering the book pages with scrap booking paper.
You will do this with all the pages of your book. It's up to you if you want any border around the paper, or want to have some color show. I would recommend leaving a border, it just seems to add more interest and gives you a bit of room if you make a sizing mistake with your paper. No one will ever know. LOL. As for the glue, that is a personal choice, some crafters like a wet glue, some like a heavy two sided tape. That choice is yours to make and you will find your way as you create more and more projects.