LH78 -
VWG = Vital Wheat Gluten. I found it at a local store, but I'm pretty sure Amazon carries it.
Poolish = this is a "starter", mainly of a little flour, dry yeast and water. Google "poolish" and watch out your spellchecker doesn't change it to "polish". Once you make a batch in a small container, kept in the frig, you "feed" it every few days with a bit more flour to keep it and the yeast active.
Hope that helps!