MMOSITE published english translation of official FAQs for Tree of Savior. Except this there is also a confirmed information that the game will be Free to Play and will include Cash Shop. There is nothing bad with Microtransactions but the most important part means to make the store just optional and not something everyone will need. But that must be seen yet.
MMOSITE provides us 11 questions concerning characters, progression, mouse control and more which you can find here.