Login and registration form in a single page Possible Duplicate:
  Print registration and login forms on same page  




I found the LoginToboggan module, but it doesn't allow to register and log in from the same page.

What should I do to get registration and login form in the same page?
This has been answered many times here.
See this Print registration and login forms on same page

For this You need to create a page for Registration like this 

page-user-register.tpl.php


And print the page contents as usual. 
in that page you could try render user_login_block

Additional resources 


http://www.trevorsimonton.com/blog/page-usertplphp-profile-php-template-drupal
http://api.drupal.org/api/drupal/modules%21user%21user.module/function/user_login_block/7