The world may never know
No.
No.
Yes
you can create an avatar then change it but no you can not crete two accounts with the same email if it will be on xbox live
if this the xbox live avatar you have to buy the prop(s)
No, just recover your gamertag on Xbox Live.
No. yes
yes
yes i need them which games have them
if u dont have xbox live that a problem
Yes you can there's an XBOX live application which allows u to put your whole gamertag data like gamerscore , achievements and even avatar on the Facebook
You can only have 1 avatar per profile. You can create 3 avatars but from different profiles. You will also need to buy 3 different subscriptions if you want Xbox Live Gold.