No, it isn't.
Flora margarine is often considered kosher, but it is essential to check for specific certification on the packaging. Different varieties of Flora may have different ingredients and production processes, so look for a reliable kosher symbol (hechsher) to confirm its kosher status. Additionally, if you have any dietary restrictions or concerns, consulting a rabbi or kosher authority is advisable.
Flora is a margarine.
Margarine doesn't contain gelatin, even then, it is not kosher unless it is certified kosher.
It would have to be certified kosher for Passover.
The label has to say "Kosher for Passover"
Yes, only if they are specifically certified kosher for passover. You can find kosher for Passover olives at any Jewish supermarket
It can be, it would require a valid Passover hechsher.
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
Yes, it can be since it is made from wine, which can be Kosher for passover if created under appropriate supervision. The bottle would require a kosher for Passover hechsher.
If you were able to find corn vinegar that is certified kosher for Passover, it would be kitniyot which means that the majority of Ashkenazi Jews would not use it.
There are kosher food companies that are now making gluten-free products Kosher for Passover and all-year-round. However, something being gluten-free has no bearing on whether or not it is Kosher or Kosher for Passover.
Arugula is an edible leaf and is kosher year round including Passover.