I don't have a BRitish medal catalogue to be certain, but I'm fairly sure the two brass ones are commemorative medals sold as souvenirs during the coronation celebrations for those two monarchs.
The copper "Columbia" piece is presumably a token of some sort.
As for the last one, I believe the term you Americans use for these kinds of pieces is "store card". Intended mainly as a pocket piece advertisement, rather than a token or emergency money, though they would have circulated to an extent.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis