In Canada we don't have to pay taxes on lottery winnings. I would first seek legal and financial advice even before claiming the prize ~ one of the conditions of claiming the prize is that you have to have publicity photos taken and those photos are published. Then everyone knows you have won the big money and your troubles begin.
I would pay off all the bills, mortgages, and credit cards for me, my sister, and DH's sibs. Then I would give them all a one-time cash gift to do with as they please. I would make donations to some charities and my church.
Then I would sell this house and move somewhere where there is no snow! :D