adding a sidebar to theme

Hi there i have no knowledge of code of any type im a steel manufacturer. Ive been trying to build a site for the past six months using word press. I got fed up tring to lay out pics and text on the template as every time i did they would never load on the screen the way i wanted them to go, so i built all my pages in photoshop and uploaded them as a photo problem with this is the code reads my page as a single photo and not individual text etc which doesnt help with search engines and the like. So now ive started to undo everything and do it all in word press however the layout problems have begun again. Basically i want to put text on one side ad pics on the other and be able to control where i want them to be located. Im guessing i need a side bar for the pics but the tutorials i have seen dont help as they say to do things on the page that are allready there e.g . Replace the above code with the following code and click “Update File”

</div>

<?php get_sidebar(); ?>

<?php get_footer(); ?>

I allready have this code in my file. I mean the first thing they say on the tutorial is click on the design tab, i dont even have a design tab. My web adress is http://www.toolestainlesssteel.com. The home page i have allready started to redo while the other pages still have the pics i created in photoshop. If you want to have a look and could me some advise on where to go from here it would be greatly apreciated. thanks