You cannot block the HTML source. If the user can see it on screen then it means that the browser has rendered the code and so is available via View Source.
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for the members only page, you'll need PHP and MySQL databases
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PHP mySQL is a very good and popular way to go about it, but it is not the only way.
Another popular method would be ASP and Access (or msSQL).
If you want somthing more basic that doesn't require PHP or ASP then you can use password protected folders. This can be done in Apache via a control panel or .htaccess or in Windows via a control panel.
Learn PHP & SQL
http://www.w3schools.com/
http://www.zend.com/php/beginners/index.php
Membership Tutorial
http://www.phpfreaks.com/tutorials/40/0.php