Moses killed the Egyptian before god called him to lead the people, to the promised land.
Here it shows that god can call anyone, and also use anyone for his work.
Before the time of Moses God spoke to people eg Abraham, Isaac, Jacob (Israel) so maybe there were some things written down. However it wasn't until after the exodus from Egypt that God made the covenant with the nation of Israel and that's when Moses recorded the laws of the covenant.
No. Moses was man. God is God and not man (Hosea 11:9).
Moses had his conversations with God on Mount Sinai.
Here Moses the great prophet and leader went to the top of Mount Sinai to meet God, he was there for a period of 40 days , but the people waited down, waiting for Moses to return to them.
Moses climbed Mount Sinai to receive the Ten Commandments from God after the Israelites had left Egypt. Abraham moved to Canaan many years before Moses, as part of God's promise to make his descendants a great nation.
When Moses asked the Pharaoh to let the Israelites go. (God also demonstrated this to Moses before)
Moses was told to get the gold. So the Isaraelites plundered the gold from the Egyptians , before they left Egypt.
No. Moses was not a son of God according to the Old Testament
The first time God speaks to Moses, Moses hears the voice of God coming from a burning bush that is not comsumed by the flames
God was angry with Moses because Moses did not follow God's instructions when striking a rock to bring forth water for the Israelites.