In what page of the book, That Was Then, This is Now, can I find a simile and a metaphor.

You can't ask for exact page numbers because most prints are different. As far as locating a simile or a metaphor in the book, Bryon is constantly comparing Mark to a lion using both similies and metaphors. Check your first chapter and when he introduces and begins to describe Mark, he makes references to his eye and hair color and compares him to a lion. He also does this when describing M&M as well.