Moses took them out (Exodus ch.12) at God's command (Exodus ch.3-4) and under God's guidance (Exodus ch.13), after they had suffered under the Egyptians (Exodus ch.1) and God had smitten the Egyptians with plagues (Exodus ch.7-12). See also:
The Israelites left Canaan and fled to Egypt because of famine. The famine was caused by a severe drought that left their crops dead and their people hungry.
Famine in Canaan. Much the same as what caused many Oklahomans, Texans, and New Mexicans to leave the plains and travel to California in the 1930s.
Moses
The number of Israelites that did not leave Egypt is not mentioned in the Old Testament. It is estimated about 2 million to 3 million did leave Egypt, including men, women and children.
The Israelites went to Egypt because there was a famine in the land of Canaan, where they were living. Joseph, one of the Israelites, had risen to a position of power in Egypt and invited his family to seek refuge there.
Pharaoh heart was hardened , so he would not let the Israelites free.
According to the narrative in the Torah, all of the Israelites left Egypt.
the Israelites did not leave during passover. When they did leave it was Moses who lead them.
They didn't. There are no records of any Israelites being in Egypt apart from the Old Testament. No Egyptian records or any other records mention them at all.
Moses or Abraham led the israelites out of Egypt i believe
the departure of the israelites from egypt
God caused them to be freed. Moses acted as God's messenger to speak to Pharaoh and to lead the Israelites. See also:More about MosesMore about the Exodus from Egypt