After reading all your helpful suggestions and using the links you sent me and doing some research on the Internet, I am considering the following and would appreciate your feedback very much.
Krakow to Wroclaw - spend 4 Nights in Wroclaw - take the train or bus to Poznan and spend 4 nights there.
From Poznan do a daytrip or an overnight trip to Torun during that 4 night 5 day period. (I cannot find a flight from Toron to Krakow.)
Fly from Pozan to Krakow. If I fly on OLTexpress airlines this flight currently costs 31 CAD at the (cheapest rate available). The cheapest rate on LOT airlines for the same flight currently is $109 CAD. I don't understand why the big difference in price. Neither airlines mentions airport name just Poznan to Krakow so I would understand that they use the same airports?
I checked on the Internet and there is a bus that goes from the airport to the city center in Poznan.
I welcome your comments, feedback, advice, suggestions, and look forward to hearing from you. I would like to book my flight tomorrow, if possible, in case the cheap flights sell out. I thank you in advance for your help.