Good question slim. what are you going to do.
If you are going to do houses you will need a bucket on a belt, if you are just doing comercial, you just use the bucket. (List)- Extension pole a must, towels, razor blades, spare rubbers, multi sized channels (make sure you have a 6 inch no matter what other size you go with), quick change hadles are nice, spare scrubber pad, water jug, Reciept book.
Dont let them fool you Insurance is always expensive for something youarn't going to use. But you have to have it. I think i found half a million for 350 a year.
Good luck.
Mac