No.
yes i need them which games have them
No.
you a little bit of space for your avatar character
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.
To get your avatar back on Xbox 360, sign in to your Xbox Live account on the console. Once logged in, your avatar should automatically be retrieved from the Xbox Live server. If it doesn't appear, check your account settings or try restarting the console. If issues persist, consider re-downloading your profile from the Xbox Live service.
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)
Yes, you can but you will need XBOX Live. When you are on a different Xbox go into your sign in board and select "Download profile". there you will need to put in your email address and then your password.
No, just recover your gamertag on Xbox Live.
No, your avatar can wear whatever you won within any game.
yes but u need enough memo to use the avatar