Not sure if you got it figured out but I am thinking that maybe some options have been removed. You may very well have checked this out already but just in case:
Click on the View TAB and make sure that "Sheet tabs" and "Row & column headers" are both checked off. HOPEFULLY that gives you a start...
As for it being grayed out I am not really sure. Maybe there is another option under view or maybe the sheet has been Protected. To remove Protection select Tools\Protection\Unprotect sheet