CANADA STOCKS-TSX advances as oil, gold shares strengthen

* TSX up 33.25 points, or 0.23 percent, at 14,303.58 * Six of the 10 main index sectors advance * Gold miners gain with bullion price By John Tilak TORONTO, April 8 (Reuters) - Canada's main stock index edged higher on Tuesday with firmer commodity prices lifting gold and oil shares as the market mood calmed after a sharp selloff in U.S. markets in recent sessions had hit investor sentiment. Due to increasing fears that share prices might have run ahead of themselves, invest