Since you asked about the list:
Luke has a good list, but as with anything, everyone has things they would add or subtract...mostly because things are different in the area that they clean.
I think if you do a price comparison you can save money buying Sorbo instead of Ninja gear. If you go with the Sorbo gear, I like to use the 'Pulex Tubex Holster (BOAB)'
Unless I missed it, the list doesn't have Rubber Replacements for the Ninja stuff. Sorbo Natural Rubber or the Black Diamond equivalent.
Replacement 6" Scraper Blades are missing from that list. You'll need some.
I agree with @Garry a 1" scrapper is a good starter...I use mine as much as I use my 6" scrapper.
Skip the Ettore bucket and buy three 5 gallon buckets, with lids...as per @Samuel.
If you stick with the Sorbo gear, then replace the Ettore Master Brass Channel 6"
With Sorbo Quick Silver 6" channel, you can use the old blades from your 14" and 18" Sorbo channels. Don't know if the screws on the Ettore Master Brass Handle is long enough for the Sorbo Channel...you can get longer screws at the hardware store. Sorbo makes a handle like the EttoreMB handle but it isn't sold in the WCR store. The nice thing about the all metal handles is you can straighten the angle out and make a Zero Degree handle cheaply.
You don't need the Turkish Towels, just use some of your Surgical Towels.
Replace the Steel Wool with Bronze Wool, little more expensive at first, however bronze last much longer because it doesn't rust.
Agree with @Garry, get a step ladder until you get the poling down. I still use a step ladder from time to time, to help get up over bushes, to easily get past top of door hardware, some neon sign work, etc.... Doesn't bother me a bit to use it when I need to...whatever it takes to get the windows clean safely.