Welcome from Austin as well. Yoschi's a good looking pup.
As far as your questions go...
Yoschi's what's known as a West German Showline GSD. If you haven't gotten the lowdown by now, what it boils down to is that there are sort of four distinct lines of GSD. There are the European Working Lines, the West German Showlines, American Showlines, and American pet lines. And around here, you'll no doubt soon discover, there's a pretty strong bias in favor of the working lines.
Lots and lots of European dogs make their way to the US, of course, and Yoschi's pink papers really just mean he was registered in Germany as opposed to in the US. And that doesn't really mean a whole lot in and of itself.
If you want to research the dogs in his pedigree, the pedigree database
is a good place to start. Just type in any of their names and see what you come up with.
Also, you can just Google the whole names of dogs in his pedigree. Doing that will usually lead you to them in the pedigree database, but it's amazing what else you might find.
As far as the breeder being reserved when you asked about breeding him...well, many breeders just are. But keep in mind most people have no idea what's involved in actually breeding to improve the breed vs. just throwing a couple dogs together and making puppies and money. Surely you know all that from the fish, but the breeder doesn't necessarily know that.
Anyway, I'm not sure if you have to buy breeding rights separately with German Registered dogs. But as long as you have them, then what you do with the dog is in the end up to you.
And don't worry about his ears. WGSL's just seem to have bigger ears, and it's not uncommon at all for them to take awhile to come up.