Here are the answers to your questions:
1. Margie was 11 years old and Tommy was 13 years old.
2. Margie wrote in her diary about an old book that Tommy had found.
3. No, Margie had never seen a real book before finding the one Tommy discovered.
4. Three strange things Margie found about the book were that its pages were yellow and crinkly, it talked about a school with a teacher, and children learned together in a classroom.
5. A telebook is likely an e-book or electronic book that is read on a screen rather than a printed page.
6. Margie's "school" was in a special study room