is there a bureau within it where lost belongings can be retrieved?
Yes  lost-and-found bureau
Grand Central Terminal
Metro-North's lost-and-found bureau sits near Track 100 at the far east end of the Dining Concourse. Incoming items are sorted according to function and date: for instance, there are separate bins for hats, gloves, belts, and ties. The sorting system was computerized in the 1990s. Lost items are kept for up to 90 days before being donated or auctioned off.

who is the statue on top of grand central UNANSWERABLE where is the terminal of the latter situated? It is located at 42nd Street and Park Avenue in Midtown Manhattan, New York City.
wiki:12129309
Grand Central Terminal [SEP] Lost-and-found bureau
By 2007, it was collecting 20,000 items a year, 60% of which were eventually claimed. In 2013, the bureau reported an 80% return rate, among the highest in the world for a transit agency. Some of the more unusual items collected by the bureau include fake teeth, prosthetic body parts, legal documents, diamond pouches, live animals, and a $100,000 violin. One story has it that a woman purposely left her unfaithful husband's ashes on a Metro-North train before collecting them three weeks later. In 1996, some of the lost-and-found items were displayed at an art exhibition.