Manage pages

In WordPress admin login (where you manage and add pages) I want different pages to appear differently. For instance I want to add a image of myself in the about page (created in manage pages), but then I want to add a contact form in the contact page (also done in manage pages). I can apply my desired layout for about in page.php but doing so will affect my contact page. I tried applying the following code into the page editor but it won’t accept <div> tags only <p> and <h1> tags.

<div class=”image-of-me”><img src=”images/me.jpg” alt=”me”></div>

How do I overcome this problem? I’ve tried making another seperate php file specifically for the about page, but I can undefined errors in line1.