What can cause my Freestar to burn antifreeze and overheat?

Bad head gaskets.Possibly warped heads as well.

I would do a check of the cooling system make Sure u don't have a leak in the system even a small hidden leak that does lose a noticeable amount at one time can still in a months time drain ur anti freeze out because it's a pressureized system so liquid will find a out first then go from there