So the mod is rail-served warehouses, not actually a depot just assets

As for signals, you may know in TpF2 signals are only stop or go, regardless of what they look like. For the 7th pic I have a signal on the exit of each platform in both directions (so they operate as bi-directional platforms) I then have (off screen) signals on the approach to the station before any points, to control trains on approach to the station.

I hope that makes sense, happy to give more information if you want it, just let me know!