Tokyo stocks were higher Friday morning as rising oil prices boosted energy-related issues, but gains were limited before the release of U.S. employment data later in the day. The 225-issue Nikkei Stock Average rose 180.35 points, or 0.47 percent, from Thursday to 38,732.41. The broader Topix index was up 15.21 points, or 0.57 percent, at 2,698.92. The U.S. dollar was weaker in the lower 146 yen range in Tokyo as investors adjusted positions ahead of the U.S. employment data for September, dealers said. At noon, the dollar fetched 146.40-41 yen compared with 146.92-147.02 yen in New York and 1…