I can't speak on points 3 or 4 since I've never tried to read a mobi format ebook on my kobo touch but I can answer the first two. It isn't possible to have a custom photo displayed when it's asleep or powered down. It will display the cover of the last opened ebook. The home screen will show the last 5 items added/opened on the touch. The carousel at the bottom can be set to show a shortlist of items in your library. I use this a "to be read" list. In your library next to the books you'll see a heart. If you touch it so that the heart is then filled in, on the home screen when the carousel is set to shortlist those books will be displayed. I hope this helps.
|