Motor probably not blown, ie., all the parts are still connected to the parts they are supposed to be connected to, but if the motor has been well and truly cooked and your description strongly suggests it has, it will probably need quite a lot of work and money before it sings properly again.
A steady coolant loss causes localised overheating that will result in the distortion and even cracking of engine parts. A systematic inspection is needed before deciding whether a stripdown is needed...
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