Disable registration and Hide “no comments” posts, ect

This question has been asked several times, and I did research through the forums on i, however I am no quite understanding what I am suppose to do, but here is the scenario, if you have a solution I would appreciate it if you can dumb it down a little.

Im using this site as a Site to Post news and relevance to my old game clans and my music I produce, since wordpress does not integrate with PHPbbb so all users would have to register twice, I am not fond of this, therefore I wish to disable user activity completely on the wordpress site (hide everything that shows the public that users can access it) however, I still would like an “admin login” button so that I can add a few friends as admin’s for site work and construction. So basically her is the brekdown (summary)

1. Disable Registration, only I can add accounts
2. Hide all “no comments” or “comments closed” areas so it is not tacky to viewers
3. Have an admin access button so people I registers as admins can log in

——————OR——————–

1. A way to just integrate PHPbbb with wordpress (not a fan of WP forum addons)

Thank you so much for your input
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