oil in the water, you may have a blown head or intake gasket or cracked block or heads. Check the oil and see if it is the Mustard color". If it looks milky then you will need to do some major repair work.
Your water pump is bad
Made mistake of pouring wrong container in radiator
there can be several reasons, however it is usually due to overheating and/or sudden cooling --- such as overheating the engine and then pouring cold water into the radiator, etc. Occasionally, the engine manufacturer may have a flaw in the head casting or too thin metal, etc that will cause it to crack too.
damaged or faulty radiator If coolant is "pouring" out of the radiator with no damage evident, could be stuck thermostat, especially if it happens soon after starting car. Could also be blown head gasket if pouring out of the fill tube with cap off.
broken water hose, radiator
You will see coolant pouring from it and your car will overheat
either a cracked radiator or a ruptured hose, are you pouring it directly into the radiator or the resivoir?
open the plug (screw) at the bottom of the radiator, open the radiator cap and let the system slowly gravity bleed while pouring more fluid into the radiator. do this with vehicle off.
There is a large cooling system leak.
On most cars if they don't have a radiator cap, then you can put it in the cooling system by pouring it in through the upper radiator hose. Even if you are suppose to do this while engine is hot DO NOT because it will have the same affect as pulling the radiator cap while hot.
Zeus approached his father Cronus as a stranger and gave him a drink that made him throw up his siblings
The overheating could be a problem with your cooling fan- The water gurgling, I'm not sure aboout, I suggest you check all you fluid levels edit by SkydiveSonic: Sounds like you may have a lot of air in the cooling system. Try pouring more coolant into the radiator (when the engine is cold!!), or better still perform a complete flush. Buy a Haynes manual for how to do this. It's quite easy to do.