how to integrate wp-admin dashboard in fornt-end theme?

hello all,
i hv to do ‘integrate wp-admin dashboard to my front-end theme’ which contains
1) WITHOUT LOGIN :
The front-end should work without any menu options from back-end whatever the theme would be installed.
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2) WITH LOGIN :
After the login menu options from wp-admin dashboard should be display with all its child fuctionality as it works in wp-admin back-end according to their “ROLE” describe by the admin.
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I know this is quite complex functionality tha wordpress don’t have and also any plugin too…
BUT
Can anybuddy help me out?
thx in Adv.