Basic Page Content Type missing

It sounds like you have installed Drupal with the "minimal" configuration. This means that no content types are generated during the installation process.

But have no fear because you can make one!

If you take a look over here:

• Drupal 7
  https://www.drupal.org/docs/7/nodes-content-types-and-fields/create-a-custom-content-type
   
• Drupal 8
  https://www.drupal.org/docs/8/administering-drupal-8-site/managing-content-0/create-a-custom-content-type

You can follow along with the instructions and add any fields that you need.