In 2000 when I started my first quilt I can give you what I spent. $99 for brother sewing machine with basic stitches, straight, zig zag, and buttonhole from Wal-Mart. Approximately $45 for cutting mat, ruler, rotary cutter combo; $15 for quilt book; and $100 for fabric from Joann's. And I did not have a coupon. I remember this because I stated that I paid more for my fabric than my sewing machine.
Now if I took someone shopping to get them started, I would tell the $300-$400, not including the machine. I would buy the biggest cutting mat, a good pair of scissors, flat head pins, stc all the stuff that I did not know about when I started.