This will be one of the last times the old GT8-100C/2S TramTrains are used. They can be driven from both ends, and such are used for shuttle services like this, where normal turning loops are not available. Starting next year, the remaining C/2S services will instead be served by the new class 492 TramTrains.
If you mean the metal pole that’s holding the catenary, that’s way closer than it looks.
No, they are inside of the windows.
Those would be window frames. This building seems to pair square windows with very narrow ones.