Hi, no problem! Unfortunately, I have no pictures or default settings for the tilesets. For some tiles, a default setting can be difficult to find, as people like to have different approaches to walkability, for example fences. You could try the demo and visit the city and room map to get a feeling for walkable tiles. Maybe that could help a bit. https://rinober.itch.io/rinobers-sample-game
Right, there is no E tileset in this pack. You could use any tileset except A from another pack in this slot if you want. As far as I remember the logics behind RPG Maker MV correctly, the only important thing is that the first tile of the B tileset in the database has to be empty, so not every tileset can be used for B. The rest should be interchangeable.
I hope this helps and you'll create some awesome maps! Have fun :)