Why is this petrol station so big? I could park 2 tanks between the petrol pumps.

People drive large vehicles here, and are often bad at it. It’s necessary.

Why would you eat pizza for breakfast?

It doesn’t require utensils, can be eaten while driving to work; It somewhere between 2 and 4 different food groups. Lots of advantages.

Why would you drink so much cola (this looks like 1l-1.5l to me)?

That’s kinda weird, gotta admit. I much prefer coffee in the morning. It is probably the 32oz, which is a little under a liter.

How is this so cheap? They charge 4€ at my local petrol station for 0.5l of pepsi alone.

Things are cheaper in the US in general. In the Midwest especially so.

What kind of pizza is this?

There’s 3 variants of the Casey’s Breakfast Pizza. See for more info.

Is midwest some kind of common marketing?

In the US, anything can be marketing. Midwest is common enough that it doesn’t really stand out.