MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
No written instructions, but there are tons of videos on Youtube that show a build timelapse. Here's a good one, starting at 0:45
Amount of material depends on your infill and support infill percentage, and whether or not you use rafts. I don't remember how much material was used, but probably over a kg. The supports I put in are supposed to be removable without damaging the parts. How well that works in practice depends on your printer's print quality. Mine turned out great, but your mileage may vary. Good luck!