1. You could use an app that has an uninstaller like memmaid or sktools that will "see" those factory shipped apps as installed so you can remove them. Or just delete folders and files using file explorer that belong to those apps and remove remnants in the registry.
2. Maybe look for an app called AEbutton. I think you can map functions like this to the end key.
lol 3. A lot of people do this and have success so I suggest read a lot before you attempt.
4. Look for Sashimi or Sprite Backup.
Enjoy your Device!!!
