SSL operates at the IIS level, therefore every port that your application
lists on can be ssl  enabled. There no way to do just a single SharePoint
page. If it were a static page, i.e. something just copied into the inetpub,
you can enforce SSL on a specific folder.

The iis resource  toolkit created a self signed certificate. It's fine if
you're just using it for testing or whatever, but obviously you'll need a
real one for production use in order to avoid the SSL browser warnings.