It would have to say "Kosher for Passover" on the can.
Yes, as fruits are kosher be default. Canned lychees require a valid kashrut certification.
Yes, they are. Wash them well, and consider peeling them if it's not too much trouble.
Yes, it is.
No.
In any supermarket, look for canned fruit with a kosher certification on the label.
Yes.
"Pesach same'ach" (פסח שמח) or "Chag Pesach Same'ach" (חג פסח שמח).
Kitniyot refers to a subgroup of food items that are not eaten my Ashkenazi Jews during Pesach. If those items are certified kosher then they're kosher.
Legumes are kosher for Pesach, however, they belong to a group of foods called kitniyot. Legumes fall under this category as they have a similar texture to chametz. The ban on kitniyot applies only to Ashkenazi Jews.
Pareve kosher for Pesach margerine is available at kosher butchers and some supermarkets that stock a large Passover inventory.
An Orthodox rabbi who is trained in kosher supervision can help
No, phyllo dough is chametz and cannot be used during Pesach.