Hi and Welcome! You'll get used to the site quick enough
TTM means Through the mail
SASE- Self addressed stamped envelope(or something like that)
I have heard some people getting Slash success recently, so you may get a response within a few months. Not sure of Axl Rose.
I'm pretty sure Slash has been signing his own autographs. But sometimes with different stars, secretaries will sign, or you may get autopens(a machine that signs for them), and sometimes even pre prints.
You can include your own photo or request one. You do not need to mention fanmail.biz. Just tell the celebrity your writing to how much you admire them and love their music, work, etc... Be a true fan!
Like I said, I believe Slash Signs his own. Good Luck and let me know if you need to know anything else!
, im new at this site so i don't really know how it works (sorry) 
, when they reply you back or send you their autographs is actually them the ones who signed or is management or something? Also what is TTM ? does the card need to say something special so they know is fanmail or something ? thank you 
