So can devs answer me, please? I must to provide docs (which ones) or no? I mean do the KYC?
Yes, you will need to do the KYC. There will be a "How To - KYC" guide released today in a couple of hours, so you can read all about it there. But you will need your ID, adress, etc.
I do hate the fact that projects use KYC. it's so bothersome, not to mention the security concerns.
Where are the good old times

, where you could buy coins anonymously without having the fear that you upload your identity card to an unknown server anywhere in the world to unknown people behind an ICO.
And there are many scams out there as you know.
But do not get me wrong, I have a good feeling with Biotron.
There were many more scammers when KYC wasn't a thing , do you remember? In my opinion it was a necessary thing because the situation was getting out of hands