No crank no start issue after overheating

Hello,

Everything was fine until 2 days ago my van was on while parked and the temperature gauge began going up. Once it started driving the gauge still kept going up and the temperature gauge light then engaged but turned back off. The car then began to smoke, was pulled over but then turn off on its' own. Once pulled over, and the hood was opened the smoke was noticed to be coming from the spark plugs for a few minutes. The coolant reservoir was noticed to be empty and the oil was low. Two quarts of oil was put into the car along with some coolant, but the car still would not start. Once the car was towed back home, I took a look again under the hood and noticed one of the hoses were disconnected which is in the picture attached. I also noticed some pink residue on the engine. Yesterday I went to start again but still wasn't successful. After explaining this to a mechanic over the phone he was implying that the engine may have seized up but never came to take a look. I really need help with this issue. Thank you.