[I bought a car in Bay City and never received it.]

Your SL account will have a record of all Lindens you have spent.  Go to Account dashboard.

[Preferences Window]

Somehow , my UI size got ratcheted up to BIG.  I can't change it because after putting the UI size slider where I want it, the "OK" button is below the screen and the UI preferences window only goes left and right, and down, not up.  Is there a keyboard shortcut that will activate the "OK" button?  Cntrl S does not do it.

[Inworld 24/7]

There's an avatar, well, yes and no... His avatar isn't there, but on the mini-map, he registers as there in the same spot 24/7/365. How does he do that?  It used to be just a mild curiosity for me, but it's starting to become an obsession to figure this out.  If I can't find out how he does that, I will have to ask to move to another Linden Homes sim!  It's driving me nuts.