1995 Chevy S-10 unconnected resercoir hose and coolent spra

There should be one hose that comes from the radiator just below the cap and goes to the reservoir connection at the bottom. Then a second hose should come off the top of the reservoir and hang down near the frame. It is an overflow line that is open.

As for the coolant spray - It could be a bad heater hose, Heater core nipple or the intake gasket is failing and spraying coolant.
Hard to say which one without seeing it.

Take a hose and rinse all the coolant off real well. Then inspect the hoses and connections. Look them over real well. Then use a mirror and look for coolant leakage at each end of the intake manifold. Also check the oil and see if there is coolant in it.
The gaskets are not real hard to change. Takes about 5 hours under a tree.