This building here is probably just a roof, under which gas pumps reside. Roofer just next to the gas station is fishy.

Building missing from aeroimage.

Unable to answer "Do you have to pay to use this restroom?" – Restroom – node/12211103298 via StreetComplete 59.2:

No toilets, maybe seasonal toilet

Attached photo(s):
https://westnordost.de/p/248923.jpg

Unable to answer "What kind of building is this?" – Building – way/443465159 via StreetComplete 61.1:

A service building. Substation.
Small booth on the left is also service building intendes for "last mile of broadband internet". On the right side, toward apothecary, is a half underground service building what looks like a geothermal pumpstation.

Attached photo(s):
https://streetcomplete.app/p/294207.jpg
https://streetcomplete.app/p/294208.jpg
https://streetcomplete.app/p/294209.jpg
https://streetcomplete.app/p/294210.jpg
https://streetcomplete.app/p/294211.jpg
https://streetcomplete.app/p/294212.jpg
https://streetcomplete.app/p/294213.jpg
https://streetcomplete.app/p/294214.jpg

Unable to answer "What surface does this road have?" – Service Road – way/488225922 via StreetComplete 62.2:

Surface asphalt, goes through building

Attached photo(s):
https://streetcomplete.app/p/325314.jpg

Here it may be some soft of passage through fence looking from aero imagery.