Tuning off admin functionality in sub sites

How do I get more user control?
For example I will be building the template sites.
The site admins will not need to set the appearance settings.
Also site categories and other features I will set permanently.
I do want them to have full control over post moderation.
Where do I find the setting for what show in the admin and user panels for the sub sites?
Should I install a more advanced membership plug in?
What would that be?

Also: It would be nice to be able to use the html plug in on a per site basis. That way when the site admin sends they can send ther own brand to their members.

Thanks for all
Richard