"Isaac took his last breath and died." The phrases "breathed his last" and "died" mean basically the same thing. See how you translated a similar phrase in [Genesis 25:8](../25/08.md). Alternate translation: "Isaac died" (See: [[rc://en/ta/man/jit/figs-doublet]])
This means that after Isaac died, his soul went to the same place as his relatives who died before him. This can be stated in active form. Alternate translation: "he joined his family members who had already died" (See: [[rc://en/ta/man/jit/figs-idiom]] and [[rc://en/ta/man/jit/figs-activepassive]])
The phrases "old man" and "full of days" mean basically the same thing. They emphasize that Isaac lived a very long time. Alternate translation: "after he had lived a very long time and was very old" (See: [[rc://en/ta/man/jit/figs-doublet]])