Let's make a few more things clear:
What you need to get started is all relative these days, you can sign up with an account at Wordpress.com, get your domain name there and build your site there. Or you can get a separate host and domain, download the Wordpress software from wordpress.org, upload it to your host via an FTP client (even if your host offers a one-click installation of software, don't ever use this!) and you don't ever have to touch an editor - unless you want to customise the layout and functionality provided by Wordpress.
Dreamweaver is no CMS or blogging software, so of course it works differently than those, how it works I'll tell you later on.
There is no such thing as CSS pages. CSS is used to style pages, as there is no alternative all pages use CSS and so all pages could be considered CSS pages. What I think you are referring to is static vs. dynamic pages. dynamic pages use a server side programming language, such as php and normally a database to populate the site with content. They still use html&css to output and style the content - and this is important, as pages that appear to be static, can also be php driven. Wordpress prior to 3.0 came with two content types, post and page, and page referring to such a static page.
If you really intend to stick with pure static pages, pure html&css, and no blog or other dynamic pages - this'll make things more difficult if you indeed want to add a login area (for what, you didn't tell us), as these html&css pages won't be able to interact with whatever you do there, then Dreamweaver can be used as a content editor for those pages and yes, at the press of a button can save the content and upload it to the host using a file name such as terms-conditions.html and this page can then be accessed through www.example.com/terms-conditions.html (or if you place the file in a folder, then of course, that folder in between).
My advice to you is two-fold:
- sign up with Wordpress.com for the moment and learn what it means to use Wordpress - just to get a feeling
- then download the software from Wordpress.org, search for a nice theme, customise it, and then get started
I wouldn't suggest Dreamweaver as you seem to be not having the skills needed at this moment, and it'd be a waste of your money, money that you can use to pay somebody for a decent design.