Do you by chance mean Lebensraum? I have heard of it before but I don’t remember the context exactly

Water and myself for me

I think the mitsubishi space star could be an answer, base model doesn’t have a smart anything, but it might not be available where you are

Definitely at least a side of half a weel

Defnitely a wheel, not necessarily a car

No hole in the middle, filled donut stuck to a toast maybe?

Absolutely

A calzone, the ends aren’t open. A wellington is usually shown cut but that doesn’t change its identification