Hi, first i think i have enough info on my page for the clutch part:
http://www.benplace.com/vw_clutch_job1.htm

Second, make shure to check the bore hole plug on the lower left and right
side of the case:
http://www.benplace.com/clutch/100_0021.jpg
i have way more probleme with those than the seal itself.

I rarely resurface the flywheel.

check the transmission side, the output seal is a leaker too, it's dificult
to tell difference between old trany oil and engine oil. This seal is very
easy t replace:
http://www.benplace.com/tranmission/DSCF0092.jpg

If you don't want to go back there soon... change everything that is inside
the bell-housing.

Cheers, Ben
http://www.benplace.com/vw2.htm

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How deep do I need to go to take care of this leak, avoid future problems,
and extend the period in which I will not have to go back into any aspect
related to the removing of the transmission.

I know I need a Flywheel Seal. I need a clutch disc - probably I need to
resurface - machine - the flywheel face -- probably

Anything else?

Maybe just bite the bullet and install a complete new clutch kit?? It will
about double the cost of parts, but a clutch disc alone is in the
neighborhood of $75, while a clutch kit - pressure plate, clutch disc, new
throw-out bearing is like $180 for a Luk kit, $150 for an alternative brand.