Question #1: Are there legitimate mediums who CAN connect with people or spirits who go that far back into a person's history?
Answer: Mediums can only go back a generation or two. Why? Because once everyone has passed that someone knows in the physical world, then they reincarnate! So, they're living a new life and their previous life has been suppressed. Because their soul becomes that of another living person, there's no way for a medium to reach them.