No one that I've ever heard of can remember the first girl, Peggy Knapp (I know I never saw her), but she was on for one season before JoAnne, who was on for four years. Then Suzanne Egli was on for one season (I thought she was much hotter than Robin and I think she's the one that helped with the garage), and was replaced by Robin.
This is all covered at the Hometime webpage,
Master Woodbutcher and seasoned termite
Shamelessly whoring my website since 1999