I really don't know, but I think it is a leopard fish.
Most fish are around 78 degrees F.
There are a variety of fish that can keep a tank clean. The type of fish will depend on the type of aquarium setup. In a freshwater tank, different types of plecostomus are most common.
Mollies eat the average flake food. Unless the fish in the tank with them are the fry of other fish, they certainly aren't large enough to eat most fish.
They are OK with most Livebearers, Barbs and Tetras.
No, they will most likely eat your fish.
Betta fish will not be harmed if they are in a filtered tank. If the new tank is about the same size as the old tank you should use the old water or most of it in the new tank. If the new tank is larger so you have to add lots of new water then you should fill the new tank with the new water and let it sit (preferably with the filter running) for two or three days before adding the fish. Also when you move the fish make sure the new tank is at the same temperature as the old tank.
Fish can disappear in a fish tank due to hiding in decorations or plants, being eaten by other fish, or jumping out of the tank.
The tank you have described is extremely small and should not be used to house any fish. 1 gallon is not enough space for a fish to swim around, and it will most likely have a very short life if kept in this tank
To clean the pump or motor of your fish tank, just rinse with water. If you use chemicals or soaps it will most likely kill the fish or damage it tremendously. just rinse it well with water and you will have a nice and clean pump for your fish tank.
You can't sell a tank... Only fish, props ( most of them) and eggs can be sold
Yes, most of the time when fish have ick, all of the fish in the tank get it. If 1 fish in your tank has ick, treat the whole tank.
Hold the fish down and throw out of tank