If a high fly ball is foul and 1st baseman tries to catch it and the ball hits the tip of his glove and bounces off his glove and goes into fair territory is it fair or foul?

It's still foul cause the ball was hit in foul territory.

Whether a ball is fair or foul is based on the position of the ball when it is touched. Since the ball was touched when the ball was in foul territory, it would be a foul ball.