The mourning period of 70 days. This was very long and significant because the royal mourning period in Egypt was possibly only 72 days long, so Jacob (via Joseph) was given a high honor.
“Luther remarks that there is no burial recorded in the Scriptures quite as honorable as this or with such wealth of detail.” (Leupold)
Jacob was 147 years old when he died. According to the genealogies in Genesis, Abraham would have been alive with Noah's sons: Shem, Ham and Japheth.
Though Jacob's sons often disappointed him in life they obeyed and honored him in death.
Jacob was buried in the same cave purchased by Abraham in Genesis 23:9. Also buried here are Abraham, Sarah, Isaac, Rebekah and Leah.
Yes, in Genesis 27:41, Esau vowed to take revenge on Jacob once Isaac was dead.
The brothers admit that what they did to Joseph was evil and harmful, this may indicate remorse.
No clear answer here but it is possible they made it up. It seems more likely that if Jacob wanted Joseph to do something, he would have told Joseph, not the brothers. This may also be why Joseph wept, because his brothers thought Joseph would not have given them mercy if they had simply asked themselves.
Joseph tells them that since he is not God, it is not his place to take revenge.
No, Joseph does not relieve his brothers of their guilt but he says that God turned their evil to good.
We know that:
Joseph was embalmed and placed in a coffin but there is no indication that he was ever buried in Egypt. His coffin may have remained above ground as a reminder that the Israelites would eventually be led to the promised land.