Re:
Removal is anti-clockwise, i.e. standard thread, - you need the correct tool to fit into your make of freewheel. I usually put the tool upright in a vice, fit the freewheel onto the tool, and use the wheel as leverage to undo it. Leaving the tyre on helps with gripping hold of it. If that doesn't shift it you might end up having to destroy something to get it off.
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Bruce