At Home With the Tobins-Breakfast today was an oft-interrupted meal for Gov. Maurice Tobin and his family, although they all did justice to the substantial servings prepared while they were at Mass by Mass Sullivan, who has served them as cook, maid and nurse for nearly seven years. Photo (upper) was snapped in one of few moments all were at table. Miss Maurice was especially proud of a gold watch, on a chain which belonged to his grandfather, given him by his father today as an inaugural present. Here (lower) he shows it to his sisters, Helen Louise, 11; Carol Ann, 10, for umpteenth time.