You what?

You do know the dipstick is for the
oil right and not the "water"?
There is no such thing as seperate radiator fluid and water, they are the same thing.
Mate, you've just f*cked your engine up, without proper lubrication it ceases.
The fluid you drained was oil, and was black because it was probably due a change.
Hope you've got money for a new engine.