When in doubt, don't. Start off simple, and add things as you feel are needed. A basic list might be needle, thread, scissors, and cloth. Add a sewing machine if you decide you like it. An iron can be useful, but a towel on the cupboard will work as an ironing board just fine.
Pins are nice.
The rotary cutter can wait, as well as quilting frames. I have also located a few free things on the web. I like free. Jinny Beyer has quilt block patterns for the beginning, intermediate, and advanced quilter. You can download them for free.