#2
the grey notes a rote notes. You start a position where ever. Every 8 notes should be a rote note to go through the scale properly.
This is an Amin scale. grey notes are all As.
#4
They end wherever you feel like it. The box shapes are just tools to make memorizing the scale easier. It makes no difference how you divide it up. I wouldn't bother with harmonic minor until you're familiar with the theory behind the major scale, at which point you won't have to ask questions like this.
Someones knowledge of guitar companies spelling determines what amps you can own. Really smart people can own things like Framus because they sound like they might be spelled with a "y" but they aren't.