Removing the #numbers after my gamertag

You would have to change your gamertag to a tag that nobody else is using.

if the numbers come after a # in your gamertag, that is because of the new gamertag system the # followed by numbers allows multiple people to have the same gamertag. As far as I am aware they do plan to remove the numbers and # from display (I could be
wrong) I also don't believe you can choose the numbers after the #

Any gamertag made after a certain date has numbers. This is not changeable or removeable

The numbers are given if you're using a gamertag that is already in use on the servers or if you use special characters. The only way to not have the numbers is to change your tag to something no one else is using.

However, ill lose my minecraft purchase right? since that one uses a name that i now cant get