Wills and Estates

Do I need a will in both the U.S. and Canada?
I am an American citizen living as a permanent resident in Canada. Is it necessary for me to make a will for each country or will one suffice? I have assets in each and pay income tax to both countries.
Can an executor abandon their duties if the estate has only debt?
If an executor of an estate wants to abandon his duties and the estate because there is only debt on the estate, can he do that?
What should we do if there is no living will and three heirs?
If there is not a living will, 3 children and a home left, what should we do? There is a second mortgage for $18,000. However, the house is worth $150,000 or more and no beneficiary chosen. Mother, who held the mortgage, is deceased. The heirs are three living children, 2 children have same mother and father ( Ages 49 and 43) 1 child has same birth mother (Age 59). Do we go to Probate court or what must do?
Will our home go to our children without probate if we die together?
My wife and I are both on the deed to our home. If she and I died together, would our home go to our children WITHOUT going through probate, or do they need to be specifically named on the deed. We have a 'warranty deed' that states 'sold to the said GRANTEES and GRANTEES' heirs, successors, and assigns forever'.
What happens to S-Corporation shares not transferred to an estate after death?
If an individual dies with a gross estate of less than $1.6 million and is the sole owner of an S-Corporation which, in his will he did not transfer the shares of the corporation to the estate, does the estate own the corporation, entitling the beneficiaries to all corporate financial records? Or, are the beneficiaries only entitled to a summary of the value of the corporation and not the privileged financial detail of the corporation? They will only directed the sale of the corporation by the executor to split the proceeds equally between the heirs. Clarification is needed as to what happens to the ownership of the shares of a closely held corporation that continues to exist two years after death and is not transferred to the estate. Clarification is needed as to what specific information the beneficiaries are entitled to regarding said corporation.