Create a custom admin page for custom post type + taxonomies + metas

You will need to start reading about the setting and options API, and then pull your CPT and Taxonomies into it.

Have a start here:

• Creating Options Pages « WordPress Codex

• Settings API « WordPress Codex

  • WordPress Settings API (options page) Generator

• Class Reference/WP List Table « WordPress Codex

  • Custom List Table Example Plugin – A practical example of WP_List_Table in plugin form

• Create a Custom WordPress Plugin From Scratch

• Administration Menus « WordPress Codex

  • Admin Menu Editor Plugin – allows adding, deleting, hiding, and re-ordering of administration items