Yes, however, depending of level of kashrut observance, some fruits are avoided due to the difficulty in making sure there are no bugs/contaminants in the fruit. One of the best known examples of such a fruit are raspberries.
There is no non-kosher fruit.
In any supermarket, look for canned fruit with a kosher certification on the label.
Not all of them are kosher. It will say on the box.
Kelloggs fruit snacks
Yes, there are no restrictions on fruit for Passover.
Certainly.
Grapes, as a fruit, are kosher. However, grape products have additional rules specific to grapes due to the religious significance of the fruit.
Usually, provided that it contains nothing but fruit and sugar. If it contains grape juice, carmine, or gelatin it's probably not kosher.
Yes, as plantains are a fruit.
Yes.
No. They contain pork-based gelatin. Although you might want to email them directly and ask about which products are or are not Kosher.
Gefen Lemon Time Liebers Mishpacha Realemon