Saturday, Nov. 13 156 Berkeley St.: Four-bedroom, 2.5-bathroom colonial with a walking path to Franklin Elementary School; heated gunite pool with hot tub; security system; in-ground sprinkler system; 5-year-old roof; $499,900.   Sunday, Nov. 14 120 Milk St.: Three-bedroom, 1-bathroom ranch near the town's Old Center; 1290 square feet of living space; attached garage and two on-street parking spaces; 0.5 acres of land; $259,900. 56 Glenwood St.: Three-bedroom, 1.5 bathroom ranch with remodeled kitchen; updated with new electric, heating, central air conditioning and basement waterproofing…