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Wow. There's a lot of things going on here. First, you'll need to use a water conditioner to remove chlorine and not simply let it evaporate. Many cities use a form which will not have toxins evaporate out, and they have to be removed. We all recommend Seachem Prime because it has lots of benefits included along with dechlorinating, like temporarily neutralizing ammonia and nitrIte (something you'll get very familiar with).
Honestly, I don't know where to start. Usually we have a list of things to do like learn about cycling, having a good test kit, etc...but in this case there's just too many issues. You have incompatible fish inappropriate groupings, etc...
At this point, I don't see a way to make it work. My advise is going to be returning the fish, doing lots of reading and starting from scratch. There's simply too many fish to safely cycle the tank with them in there, there's too many incompatible fish for the tank, and honestly not much you have to work with there.
I'd go back to Petsmart with the fish and demand they need to be returned. No one with any integrity whatsoever should have sold you all those fish for a new tank IMO. It might take yelling at a manager...but that's really the only option at this point.
If you choose to keep a few of the compatible ones and cycle with fish...it'd doable, but removing most of them is going to be necessary in this case IMO.
In the mean time, those fish are going to be pumping out a ton of ammonia since the tank is not cycled. It will rapidly build up and the water will become toxic. It's absolutely vital you run out ASAP and purchase a dechlorinator (preferably Seachem Prime) and begin doing large water changes every day until you can take the fish back.
Here's the article which is going to be absolutely mandatory to read.
I just learned about cycling but I already have fish. What now?!
We don't blame individuals for believing the (horrible) advice of stores...but hopefully this will show you the importance of doing your own research. This is a bad situation to avoid in the future by researching before purchasing.