Using a top bar on custom theme

I am creating a custom theme, i dont have a lot of experience with wordpress, more with joomla. But the thing is that I have a top bar, which I created on the header.php file. It has the following lines:

<div id="toolbar">
<a href=""><div class="btntoolbar">Contact Us</div></a>
</div>

so this toolbar is on top and one of the problems is when I log on to joomla, the wpadminbar cover that line. And the second part is, I created a contact form, but I dont know what to put inside the toolbar code so I can add things from administrator, and specially the form I created with form builder.