How do you move? I have to admit I'm a little confused by that question.
Hordes totally confused? You're gonna need to be more specific here.
We are going to use mini's so how do you represent movement with mini's Well we usually set the scale of the map (eg. 1 square inch = 2 square metres, or 1 square inch = 5 square metres, etc.), and then do movement based on that (rounding up for any odd movements/ranges/blast radii/etc.).
In character creation what do you put in the little box that is inside the big bos I assume you mean on the Strength and Toughness stats? That's for your unnatural stats. So if your Marine has a Toughness of 50, his Toughness would read (5)0, and in that little box you'd put '10' because has Unnatural Toughness x2, which doubles his Toughness Bonus (which is 5, because his Toughness is 50).
I've attached a completed version of our custom character sheet because honestly we find it easier to use as it has more room. The bits that have been blacked out have been done so due to NDA's (no preview rules for you!

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