Buy coins for faction and stuff !?

Hello,

Before all, I'm french so, sorry for my bad english.

I would like to change my characters faction and buy some stuff but I didn't found where can I buy coins and where can I use it for changing m faction (for the stuff it's ok ! :) )

Thank you for all !

https://www.warmane.com/account > Donate

you can spend coins here:
https://www.warmane.com/account > Store (to buy gear and mounts)
https://www.warmane.com/account > Services ( to change faction and other stuffs)
https://www.warmane.com/account > Trade ( to buy characters/Items from other players such as gold, BoE etc)

Hello, Thanks for your reply,

So, If I want to buy some coins, I have to make a donation ? If I make 50€ of donation, I much coins I have ?

you can check by your own before to buy them. Just go here:
https://www.warmane.com/account > Donate and check what options it shows