YesYes
Yes.
i believe you can put the antifreeze anywhere in a jeep
Coolant level is probably low, Have it checked for an antifreeze leak.
You will need to replasce the heater core.
An antifreeze leak.An antifreeze leak.
Most of the "stop leak" products turn your antifreeze black. It's very likely someone used stop leak in your car.
A leak.
A 1997 Jeep uses the regular green antifreeze.
That is most likely antifreeze. Have the cooling system checked for a leak.
From the transmission? No? But antifreeze & transmission fluid can mix. Your transmission uses a small portion of the radiator as a transmission cooler, normally at the very bottom or side. In very rare instances, this cooler can develop a leak and allow transmission fluid and antifreeze to mix together. The only fix is to replace the radiator.
Most likely a leak in the heater core, should be on the passenger side under the dash.