Adding editable regions to templates

Hi all,

So basically, I am used to using Dreamweaver and have recently changed to using wordpress due to its powerful possibilities and its useful support. I am building a large site with around four page templates, but these page templates will be applied to many page and so I need to find a way to make it easy to change all the pages.
I want to be able to view and edit the page template code of a page but only the code relative to that page.

With dreamweaver when I create a template and apply it to a page, I am able to add editable-regions. Then when one opens the page associated to that template to edit it, I am able to see the page and all its features and edit the content only in the editable-regions.

What I want to know is how I could do this sort of thing inside the WordPress content editor. In a way that I can see the page as set up in the template, inside the content editor, and make edits specific to that page, that when saved only updates the page code and not the template code.

An example of this, that hopefully makes it clearer, would be: two large tables on a page and some tabs. I would like to include the table in the template as apposed to the content added by the content editor. Yet by including these tables and tbas in the template, although they are shown on every page associated to that page template, I have no way of editing the content in these tabs or tables. Due to the large amount of pages needing to take the structure of these tables tabs exactly, I need a way that I can easily change the structure of the tables or tabs on every page at once without effecting the content. A similar table to what I would want can be found here: http://computers.toptenreviews.com/laptops/

I know this is complicated and there may not be an easy way to do it, but I am sure it is achievable or a suitable alternative is. Sorry for the length and explanation of this post it is quite difficult to explain what I need to achieve.

As I say I am new to WordPress and will admit I am in no way an expert with all its tags and attributes.

Thanks you in advance!