Answer
You need to speak to a lawyer regarding your rights. I don't know if your estranged wife has passed away or not but you definitely need to speak to a lawyer regarding your rights in this matter.
All the rights required. He or she does not need to be an executor to receive any bequest. It is the responsibility and legal duty of the executor to carry out the wishes of the deceased.
No, you have no rights to change your father's will.
No and no.
They certainly do not have the rights. The executor has no power while the testator is still living.
They can do whatever they wish with their rights and property.
They have absolutely no rights. An executor does not obtain any power until appointed by the court.
Yes a wife has monetary rights to her husbands home in a divorce.
depends on the jurisdiction, consult a lawyer
The executor has the same rights as any other person. They can ask someone to change their will.
An estranged wife is still married and has all the legal rights that inure to a spouse. Your legal status is not changed by living apart, only if the marriage is legally dissolved by a divorce. You are legal next of kin to your husband.
You need to consult with an attorney to determine what the child's rights are in your jurisdiction. If paternity can be established the child may have a claim to an intestate interest in its father's estate. The matter will need to be decided by a court.
They have the same rights as they have with an estate that has a will. The creditors file their claims with the executor.