Is it possible to show configuration and management pages other than site collection administrator. Can i add an user and allow him to be a access the configuration and management pages
Currently it's not possible without changing the code. It's definitely something that's come up before and is a feature I want to put in. I've raised an issue for it here:
https://sharepoint2013fba.codeplex.com/workitem/25
https://sharepoint2013fba.codeplex.com/workitem/25