More than 200,000 people remained without electricity today after New England was battered by the earliest snowstorm of the century. The death toll rose to six from the weekend storm, which piled snow as high as 20 inches in New York's Catskills. (Story, Page 6.) More than 160,000 customers in New York state, mostly in the Albany area, remained without electricity today. An estimated 26,000 were still blacked out in Vermont, along with 15,000 in western Massachusetts and about 37,000 in Connecticut.