I believe I've heard that there are 16 or 17 total.
A certain number you get by leveling up, the rest from Prospector Zeke...
I don't have the specifics, sorry, being a N00B, but I'm sure someone will give you a more detailed answer.
Spend them wisely...I didn't know what they were and the first two I spent on things I wish I hadn't now. Just part of the learning curve.
You can go to golem court and talk with the stork there who will refund your spent training points for crowns, the price depends on how many spent, your level, and how many times you have done it. My only wish is i could use in game gold for it and not crowns, but meh at least it is available.