New to WH40k; what are the other-than-minis essentials to get started?

I'm looking to get started with WH40K. Aside from the miniatures themselves, what essentials and supplies should I get to play? I'm lining up some Chaos Knights to buy from a friend because big stompy mechs, but it'll just be the models. What's the best way to do stat sheets, do I need measuring items, what dice, etc?

I read the Beginners Guide and couldn't find too much detailed information for that.