You replace both bearings halves. They come in a kit.
Grease with assembly grease the side that mates with the crank
Keep the side that is against the con rod and the cap dry, no need for lube there.
marking and eyeball judgement.
You don't need to really replace the oil strainer gasket... Its in a pool of oil anyway.
15149-17010
I've built a few VW engines from the block up (both 1776cc) but man that was a long...long time ago so needless to say my confidence and memory is a little lacking. Cheers!!