This number represents how many years the player have been a member of xbox live.
First go to your profile with your avatar and select Customize Avatar, it's one of the options on the right. If you don't have Xbox Live then select Profile, then edit profile, then gamer picture.
If you are meaning on how to recover a gamer profile from the Xbox server. Just select what profile you want to choose, go right to the end and select recovery gamer profile, go through the set up and your done!
Click on your profile picture from your profile, and then in the lower right hand corner, click download.
You can edit your answers account on your profile page. Click the profile page link on the top right corner
Go to minecraft.net, and in the top right corner click register. It tells you what to do from there.
Your details can be changed by logging in to Ping, clicking on My Profile in the top right hand corner and then Edit My Profile.
In the top right corner there is Profile and Account, click Account then at the bottom there is "Log out"
click on my profile and look at the the top right hand corner
it's in settings in the top right-hand corner of your screen
scroll ova ur username at the top right corner. go to settings and click change profile name
They are located at the top right corner next to your teenbiz 3000 profile picture.
On the top right corner, you will see your profile. Press it and you will see the logout on the bottom.