Sounds like you should be set to go =D
That sure is a Hell of an Toolkit you have there - I know some Artists including myself that have less at theyre disposal xD
Than again, I never found myself in any need for more than the Adobe CC suit (atleast in a 2D area)
I usually go by 20€/h.
make a time estimation, and than agree on a flat price with the client which is based around that number.
Yeah, school was pretty cool, id say best years of my life so far ( dont tell my Girlfriend ;D)
No, sadly spine doesnt come with those animation-Ref sheets, or atleast not that I know off.
It does come with the Spine File of the Charackter (Spine Boy) and a bunch of other Example Files though.
However, its just an Image that he put in the background.
A little google search for "animation reference sheet" or something along the lines should deliver some usable results.
E.G.:


Loading Image
In the end, youll always need that creative spark though to make the reference fit the specific needs of your project, and comondate for eventual flaws in the reference.