Quilting is suppose to be fun, so my 1st must have is a piece of advise I received at a quilting class...Don't worry about perfection, the quilting police are not going to come knocking on your door to inspect your work. Do your best & have fun. Your work will improve with time, so enjoy what you are doing!
Other must haves...
Rotary cutter
self healing cutting mat
scissors
ruler
sewing machine
good lighting :)
fabric
thread
and a plan
Start with big square blocks...then go from there. There are tons of simple to do free patterns on the internet.