How many years does the history of Ashan encompass? Did all races exist from the very beginning of time?

Oh, there's a lot written about this. There was even a thread on the forum somewhere. Even the respected Pobeditel has a map on this topic.
I will only say that initially humans, dwarves, and elves were part of an alliance – the Shantiir Empire. Demons existed in parallel. A little later, mages appeared, followed by necromancers; dark elves emerged from the elves. And during the first eclipse, orcs were created by the mages.

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/topic/9135/ - here, read it at your leisure if you have time)