You are initially required to have your Xbox on, from the dashboard specify on y0our avatar after clicking on 'My Xbox' option. Select "Join Xbox Live" option and give your account details as requested by the protocol. Check out http://www.ehow.com/how_2310301_sign-up-xbox-live.html for more details.
What do you mean man? I cant understand the question here. DO you want to renew your xbox live? Or are you asking how to redeem a trial code? or are you asking if you can get another trial month of xbox live?