It depends on how fast it's leaking and how careful you are about keeping it full of coolant. If the engine overheats, even once, it can result in a warpedhead, blown headgasket and possibly other problems.
If the hose is leaking, replace it.
Generally if one is leaking the rest are not far behind so I suggest changine all of them and the easiest way is to pull the enigne.
YesYes
There are freeze plugs on the front, rear, and flywheel side.
cracked water jacket in the head
Fuel pump or freeze plugs.
Fix the cause, or keep adding fluid.
Various strategically placed areas on the block.
They are on all sides of the block.
Yes
Head gasket, timing cover gasket, or hose leaking.
On all sides of the engine block