1. Yes, you go to the Leap Frog website and personalize the readers (name, age, etc) and load the books. If not, the when you try to "read" the book, the reader will prompt to have you do so.
2. The Tag Jr books can be read by both the regular and Jr pens. The Tag books can NOT be read by the Tag Jr. When using the regular Tag Reader, it will "read" the Jr books like the Tag Jr does (Tag will read each word while Tag Jr reads the page so on a Tag Jr book it reads the page instead of each word).
My daugther loves hers. She used to take the Jr to her daycare and "read" to the babies while the caregiver was fixing their meals. Now that she is almost 5 and starting to read, she loves the regular Tag.