Marketpress Etsy Clone and User mangerment, etc..

Hello,
I have installed all set now so users can create their own shop (last issue solved), but I would like that users can only see certain settings in the admin panel. How do I solve this the best way?
I want them to only see "Market Press", "Products", but even there, I want to limit what they see, not all settings. Then I want to also be able to determine the choices made in the market pressure, as I only want users to sell their products in Sweden with Swedish currency etc etc.

I would also like to integrate BuddyPress on my website. I will namely making a website where customers can create their store but also to be active in the forums at same website. A visitor can create users to access the buddypress and its store with the same username and password? Possible?

https://premium.wpmudev.org/forums/topic/how-to-build-your-own-etsy-like-site-using-marketpress