It's 19 years old so unless the cooling system has been flushed a few times during its lifetime there will be a lot of sludge in there. First job: a flush and reverse flush using radiator cleaner. Buy a replacement bottom hose so you can take the old one off and drain it properly. Then fill with plain water and see if you still have a problem. Do the fans come on when the engine gets hot or do they come on immediately? You may have to replace the temp sensor/sender switch. Is the coolant actually flowing through the heater matrix? Once it's all working properly, drain off the plain water and re-fill with the correct coolant, running the engine with the expansion tank cap off in order to purge any airlocks.