OK. What would you pay for? The stores rely on the Internet to schedule deliveries, pay for deliveries and track deliveries. No Internet, no deliveries. At least until they resurrect a decades-old paper based system, which will take weeks at the very least.
And where would you get the money? Cash machines rely on the Internet to check your balance and give you your money.
Do you have a stash of them in your house? They haven't made any in years.
The Internet now enables the power grid, traffic lights, water pumping, freight deliveries and cash machines (to name just a few things.) It would be a big deal. The reason you shouldn't worry too much is that the Internet is pretty resilient - not that you'd get along fine without it (you wouldn't.)
In order: Same things as always.
No, not the important ones, they mainly use dial-in phone ordering and pay via the same monthly bill and auth-recipt method they have for decades.
No amazon deliveries maybe, but food and gas and parts will be fine.
It's called an Automated Teller Machine because it performs the functions of a teller at a bank branch, who can still do just fine without the net. (Do you even bank? too young?)
I have one, I KNOW there is at least one at every gas station around me, as well as all three grocery stores as fail-safe to if the DSL link for interac goes-out. Weather young N00bs know how to USE one is another question(lol).
No it doesn't(electrical grid), that's direct-feedback at provider and synced via the laws of physics. aything out-of phase becomes load and is forced into phase by the short. Learn to electricity.
No it doesn't(traffic), that's a municipal network everywhere I've ever worked on them, every single one I've worked on has a junction box with timers servicing a small area.
No it doesn't (water pumping) capacity is inferred at pump by back-pressure in every grid I've seen.
Some freight, yes, most of the dispatchers I know are still phone-jockies though.
Cash macheines(second time, ok more detail) run off dedicated server links in a private hard-wired network last I checked, physically separate from standard internet though with some cross-talk at specific nodes.
It would be a minor inconvenience, you lack knowledge and imagination on the systems in place already.
It is resilient yes, much like cellular networks.
I'd do fine, because I understand the systems already in place in society. Sounds like you'd curl up and sob without instagram and etsy?