Sorry, I have some quick questions. May be they were asked and answered before, but thread is to huge to find anything

1. How to add friend? Sily, I know, but really don't understand how. It suggests 3 options of sending messages. Facebook, email and some abstract text message. If I want to add someone, who wrote his username in friends-searching thread, I should send message to this name? And he will become my friend if he writes back?
2. What happens, If I breed hybrid dragons? Different sites are full of breeding tables of clear species and sometimes mention, that rare dragons can be produced by mixing hybrids. Is there any more or less complete table of breeding hybrids?
3. How does dragons level affect breeding? I see, that baby (levels 1-3) can not breed at all. I've read that if two dragons of different levels are being mixed, older one can be treated as first, even if he was set as second. And I've read somewhere that in order to get rare dragon, player needs to breed two lev10 dragons. Is it all correct? Are there other tricks?
Thanks to anyone who would reply.