Does God know everything? Yes. The Bible says he knows the beginning from the end.
Do we have free will? Yes. From the early days, believers were given the Great Commission to take the Gospel to the ends of the earth. The salvation message is given and the hearer must choose life or death.
God knows everything and people are free to choose. They co-exist. In the natural it makes no sense, so we believe by faith that both are true simply because this is God's Word. We were not given the mental ability by God to grasp this. It's easier and less stressful to simply take God at his word, believe that both circumstances exist by design, give thanks to God that he knows best and go on with our lives trusting in his greater wisdom and live our lives by faith...which is all he asks to do.
As far as advancing automotively from the Edsel to the cars of today...OK...we can handle stuff like that, LOL
How can a person choose if their "choice" is already known in advance?