* TSX rises 51.24 points, or 0.40 percent, to 12,807.16 * Eight of 10 main index sectors advance * Manulife up nearly 2 percent after price target increased By John Tilak TORONTO, Feb 8 (Reuters) - Canadian stocks touched a one-week high on Friday, led by financial and energy shares, as positive economic data from China, Europe and the United States offset weak domestic numbers and as Manulife Financial Corp rose on reaction to its results. China's exports and imports surg