I would wait until Hancock's or JoAnn's has a sale on quilting notions.
If funds are not limited I would buy one of everything. Ha!
No really
You should start off with
A good rotary cutter, mat and ruler. You will need pins, needles, marking pencils, seam rippers, "yes more than one", and scissors.
If quilting yourself you will need batting and backing fabric.
Let's not forget fabric, fabric, fabric.
Of course you will need a sewing machine and that will mean more supplies. Needles, thread, bobbins, oil, 1/4" foot and again look around, the items are endless!!!!
Look around as there are lots of other items to be had.