I'm still not sure what you did.
Where did you create the folders? On your local computer or on your server?
If you created them locally, did you upload them to the correct places on your server?
You don't need to copy the entire contents of the /classic/ folder to create a custom template. Only copy the files you need to change. It makes updating/upgrading easier because you've isolated the files you actually modified.
To create a very basic custom template (you can build from there), you need:
includes/languages/YOUR_TEMPLATE/english.php
includes/languages/english/YOUR_TEMPLATE/index.php
includes/languages/english/YOUR_TEMPLATE/header.php (to change the logo)
includes/templates/YOUR_TEMPLATE/template_info.php
includes/templates/YOUR_TEMPLATE/common/tpl_header.php
includes/templates/YOUR_TEMPLATE/common/tpl_footer.php
includes/templates/YOUR_TEMPLATE/images/logo.gif
includes/templates/YOUR_TEMPLATE/css/stylesheet.css
Anywhere you see a /classic/ folder, you can create a folder for your custom template. You can copy the necessary files from either the /classic/ folder, the /template_default/ folder or the parent folder.