I can turn horse out as well as anyone and better than most.
I buy individual brushes, all natural fibre.
I like a leather backed body brush, medium to stiff bristles.
Dandy brush (rarely used)
Metal curry for cleaning the brushes.
A hand towel and a couple of sponges.
Mane comb - I use a handled dog comb.
One of the most vital pieces of equipment I have is a stainless steel mass for removing mud. I just bought six of the round stainless steel pot scourers, unravelled them and then plaited them together. Brilliant and even the most ticklish horse doesn't mind it.