1. There are various events and tasks you can do in the game to earn notebooks/pages, but there aren't any cheats that will give them to you.
2. Yes. iOS users at least have the ability to use their Apple ID instead of Facebook, but Android users can only use Facebook. We recommend that you back up your save on Facebook using a vanilla installation of the game before you start modding for the very first time. If you've already done it, it might be too late.