I am in process of dealing with a lot of those issues on '42 GPW.
There are of places where the vehicles commonly leak, but on that one, I'd give it a good bath and then drive it a little. When there are fluids everywhere, it's hard to tell what the source of the leak is.
Before going any farther, I'd recommend getting it in the air (wrecker, lift, ramps, etc.) and soaking it in degreaser and washing it off. This is a friend's M38 that leaked from everywhere.
Once it's clean, take it on a short test drive, then come back and re-inspect. The sources of the leaks should be a lot more obvious.
On the first shot, I'd say that's an oil pan gasket and either the timing cover or the oil return line from the oil filter to the timing cover. But there's oil coming down the side of the block as well, so perhaps the fuel pump.
If you're going to do the oil pan gasket, do a rear main seal at the same time, they frequently leak. The only rear main seal on the market that is neoprene and works is the one from Midwest Military. Don't use any other.
Use a good gasket (I ended up using a rubber seal versus the cork pictured), make sure the pan flange is straight (don't overtighten it, flatten it with a metalworking hammer if it's distorted), use a good gasket maker, let it cure for 24 hours, then cut the excess off with a straight razor and touch up the paint.
For the transfer, they frequently leak from the output shafts, seals were out and the flanges get wear grooves in them. Machine them down and use a seal with a corresponding smaller inner diameter, get a sleeve etc. The grease is being slung off the u-joint, but you will need to clean it and drive it to see where else it's leaking.
Transmission is hard to tell. They all seem to leak out of the front seal.
Last picture is also hard to tell, because it's wet from everywhere. But I definitely think some of that is coming from the transfer fill plug.
