If you have google account set up to back up your stuff, then yes, it will fully back up all that you mentioned. Open "backup and reset" in settings, be sure that "backup my data" and Automatic Restore" is checked. And you should be fine.
Now, me personally, I use Smart Switch by Samsung on my pc and back it up there too, just to be sure. If you have a spare samsung phone around, you can download smart switch to that device (from play store) as well as your note 4, and send everything over to your spare phone, including wallpaper, email settings and more, then once you've done the reset, you simply install smart switch on your newly reset phone, if the google back up didn't take, and move everything back over from your spare phone.
Chris