The only thing antifreeze will damage is paint and some plastics. Your car will not be damaged.
No, antifreeze is non-corrosive, and doesn't melt plastic like gas does. You are 100% fine.
No , the stuff is pretty harmless other than that it will poison you pets .
Won't hurt the car though .
No
and it had an undercarriage wash I drove over. Will this antifreeze mess anything up underneath on backside of car?