Find original purchase price of property w no deed of sale?

[Dina Harleth]

I was gifted a house by my father and am unfortunately not in contact with him.  I have no deed of sale and no idea how much he originally paid for the house.  This info is imoprtant because I may wish to sell the house and need to know what his (which is also my) cost basis is/was. I did go to the county recorder's office and get the "document transfer tax." Is this all I need to determine how much he bought the house for?