The first Sampler was posted last year and these quilt blocks were in that Sampler. All you need to make these is the directions for making a Boston Block and then look at the layout to see where the colors go and how to lay the blocks to put them together into the Quilt Block of your choice.
Boston Block Directions
http://www.quiltingboard.com/tutoria...al-t38879.html
As to how much fabric that depends on how many quilt blocks you want to make. If you send me how many quilt blocks and the size of quilt you want to make I can figure it for you.