I've been to the Teppanyaki for lunch, I thought it was great and didn't think it was over priced for what you got. Some chefs are more entertaining than others though I think.
As for the Hilton, you'd need to catch a bus to Downtown Disney Marketplace, and walk from there, and forget about the Ticket and Transportation Centre...last time I looked, they'd stopped most all buses from there (only Wilderness Lodge, Animal Kingdom and MGM busses run from there) - to get to DD you need to pick up a bus from any WDW resort now, which is a pain in the bum.