This is unknown, since only the Greeks were writing down their myths at that time.
Kronos is a Greco roman god.
No: the Midgard Serpent is of Norse Myth origin.
Ymir had a boy and girl come from his armpits; and a six headed son from his legs, none of them are named in Norse myth.
It came from the greek story about the Pandora box
Prophecies came from oracles in Greek myth.
In Greek myth the griffin warred with the Arimaspians.
Unlike Roman religion, which borrowed from Greek myth extensively and has clear equivalents to Hellenic deities, Norse religion developed in isolation from Greek and Roman mythos. There is no clear equivalent to Venus (who was a Roman goddess, equivalent to Aphrodite in Greek myths) in Norse mythology. However, as a goddess of love, beauty and sexuality, she has a strong semblance to Freyja, who serves all the same functions in the Norse pantheon.
Aphrodite was a goddess of the ancient Greek people before she was a "myth".
In both stories the big evil giant is defeated and his body is used to make the world.
It is unlikely. Pandora is of Greek mythology and was wife of Epimetheus. Freyja was a goddess of Norse myth and wife of Óðr.
The Norse myth.
Gaea, the earth came out of darkness