If the total vehicle mileage logged  is even an available supported data pid somewhere it probably be in the module that is responsible for maintenance required/ service due messages.
  I try to look for old service records, in owners manual, t-belt replacement and other stickers or mileage in marker in engine compartment. I Run the VIN # or old  Plate # with car dealer network and see if open recalls exist and what mileage of last visit, also visit the state's emission test center to run  vin or plate to see if it passed the last testing and what mileage it had at last testing.