Wills and Estates

Who pays inheritance taxes on an estate in Pennsylvania?
If I make a will in Pennsylvania and do not specify that the estate pays for all the inheritance taxes of of the beneficiaries both lineal and collateral is each person responsible for their own tax? or does the estate pay all taxes if it wasn't in the will? What about in the case of special bequeaths?
Can I give up my inherited property interest without financial responsibility?
Is the form I can sing giving up my portion of inherited property. The estate has not been through probate. I have no interest in the estate but I also want no financial responsibility for the estate.
Can I take over my father's estate from my aunt?
My father was in a wreck 5 years ago. He is very unstable to make decisions. When his dad passed he got everything left to him. My aunt who is my dad's half brother's wife is over his estate. I am his first born and need to be over that not her.
Can I refinance a house with a 10-year restriction in the will?
could i refinance a house that need work that my brother and I are trustees? Also, in the will it states we cannot do anything with the house for 10 years, but my sibling lives in it free and owe taxes? what are the best alternatives?
Can I resign as executor or power of attorney before someone's death?
I am am executor of a will and the Power of Attorney and Power of Attorney for Health. Can I resign these positions before the persons death?