The 1,2,3 are shiners. I think they are all the same specie. I do not recognize the species without a better look at the extended fins.
4 is a small fingerling trout with parr marks. Not sure which one. maybe a fingerling brook trout? .The Ontario Ministry of Natural Res does have a bait dealer law against selling wild fingerling trout as bait fish. The place you bought the minnows evidently did not carefully look and their fish they were selling. see below
https://www.salmonography.com/Salmonid-Topic/Parr-marks/i-92VvqNH/5 To me looks like a northern red belly dace
6. I think is a bluntnose minnow, note it has breeding tubercles on the snout (nose).
All are okay to stock bluntnose will definitely spawn if correct flat underwater rocks concrete tile are present; although the shiners, dace and trout might even spawn in your homemade stream.
https://www.ontario.ca/document/ontario-fishing-regulations-summary/bait
