We are looking at the 1st brown/cream quilt right?
I estimate that for a quilt 99" x 99" using 4 fabrics, you will need 3 yds of the 2 darker fabrics, and 2 yds each of the lighter fabrics. add an extra 1-1/2 yds for a 4" border.
of course it doesn't hurt to get a bit extra in case of mistakes