How much money have you spent on PoGo?

$0, including all of that other stuff

I don't want to think about it. It is a lot, both in-game and on the stuff you mention. I've even bought two Go Plus' since I lost my first one.

A small loan of a million dollars

I've probably spent close to $1000 in game. But i have the money, and I love playing, so no regrets. I don't see spending $20 in pokecoins as any different than spending $75 to take my family to the movies or $150 to take my wife on a nice dinner.

Btw, I also drive a lot for Pokémon (I live in a large sprawling city) so I've spent tons on gas.

Nothing unless you count the electricity to power up the phone and maybe a little gas while I've idled at a stop or gym. I mostly just walk around my neighborhood, see what's around when I'm out, and look at my phone at work.