Obviously, bare in mind that the methanol, plus it's vapour, is somewhere between a grumpy king cobra and perished bungy jumping cord, in it's lethality.
The cobra, and the cord, probably taste nicer.
If you had a suitable pair of gloves, you could lower a pipe into the methanol, so it fills up, then stick your finger over the end as you pull the pipe out. That would start the syphon.
Once it gets so far down, like with 100 litres or so, you could wiggle the IBC onto some block to get the last bit out, or tip it back away from the tap, and let it out slowly into a container. That could be a bit messy mind.
Just don't smoke to many fags while your doing it.