Has any way I can change sex with my character?
C3 Oracel can change Gender with a skill but idk if it was a rumor or not. As far as i remember they can but you have to w8 for rank 8.
and all my cloths will change to the other sex, even the Cash Cloths?
Not a rumor just we don’t know if we will actually get it at last or not… It depends on the developers. 
Good question but no one could answer to it…maybe the devs themselves… X)
They read the forum? Someone can mention they here?
I don’t rly know. But c3 Oracle is far away. Rank 8 classes are not in the game yet… So it doesn’t rly matter yet. :x I think all you can do is wait for now.