If you’re working on a new WordPress theme and you want your Admin Toolbar to reappear at the top of the page, be sure and add these two things as soon as you can to your new template:
In the <head> section of your template, add this:
<?php wp_head() ?>
In the <foot> section of your template, add this:
<?php wp_foot() ?>
WordPress can’t give you the Admin Toolbar and all of the other goodies that go with a new template unless it knows right where you want the extra head info injected; this is the same with your foot info.