Add extra fields to editor, show them in the article

Requirements are listed below: 1. Add fields to the built-in editor on the back-end. 2. Display the red-marked fields in the article, allow users to see those info in the front-end. 3. Make sure users have ability to use Joomla Drop-Down Menu to publish an article to Multi Parent categories and Subcategories. (Your team have done this, please just double check.) Then remove the Multicategories Module below the richtext eiditor. 4. Users ability to use 'Advance Search' to filter out an article from multicategories (including parent and sub categories) according to the input info (i.e., the title, publish date, and the Author, etc) 5. Help me migrate the site to hosting service after completion. 6. Please provide me with another site url (currently, it is [login to view URL]), because my boss checks the site too often, he always have opinions. Thanks for your time