If you can find a bottle that's labeled kosher for Passover. However, sesame seeds are kiniyot so Ashkenazi Jews are not supposed to eat them or any derivative.
Yes, grape seed oil is kosher for Passover for all groups including Ashkenazim. You would have to check the labeling for a valid Pesach hechsher though.
Yes, sunflower seed oil can be kosher for Passover, however, it is classified as kitniyot, therefore Ashkenazim do not use it. You would have to check the labeling for a valid Pesach hechsher though.
Oil has to be marked kosher for Passover. Oils that are fine for all groups: Olive Nut (macadamia, almond, walnut, etc) Cotton Seed Grape Seed Kitniyot Canola Sunflower Seed