Query 'Aircraft LOPA' on your preferred search engine if you want more info on interiors.
LOPA stands for
Layout Of Passenger Accommodations.
For example here is an Air India 777-237LR:
Also most of the various aircraft specific pdfs on the Boeing Airplane Characteristics for Airport Planning page have the basic LOPA options illustrated:
http://www.boeing.com/commercial/airports/plan_manuals.page