It depends on the state you live in! Most often, if both people have established residency and get mail delivered to that address, pay bills together or are responsible for bills, and have a financial obligation or interest to the residence - then NO, no spouse can lock the other spouse out. One can volunteer to leave, or police may ask one party to leave for a specified time (if they get involved), but the right to the residence still remains. The judge can remove a party from the residence, but that would be because of a court order/restraining order/protective order.
Then the house needs to be sold.
Depends on the will
Not unless the spouse signed the debt paperwork. However, will they chase one spouse to get to the other spouse, yes they will.
If the two of you are married, I believe you are responsible.
The laws presume that the spouse inherits at least half, if not all, of the other spouse's assets. But the estate has to liquidate all debts before they can transfer any assets to the spouse. One way or another, the spouse ends up paying the debt. The spouse has some right in all real property owned by the husband. If the assets are not enough to cover the debt, the real property may have a lien placed against it to cover those debts.
Only if the other spouse is given keys to said locks. With two people who are legally married, one cannot lock out or evict the other without going through the court system in some fashion. They must file for legal separation or one spouse has to have broken the law in some way (resulting in, for example, a restraining order or involuntary psychiatric hold). Even if the spouse wanting to lock the other out is the owner of the house and the other is not, it doesn't matter, because they are said to have an "interest" in the property due to the marriage.
is it illegal for a spouse to blackmail the other spouse
TAKE IT WHERE EVER U GO OR LOCK IT IN A SAFE
Then the house needs to be sold.
Not directly. The spouse that receives the inheritance can determine what is done with that inheritance. There is no automatic right for the other spouse to receive any of it.
I think that the other spouse is untitled to half of what the two had together, which includes the amount of money.
Depends on the will
no
Yes, so be careful. You have to be sure that you will stay with your spouse.
Yes, and they frequently are as in the case of the standard husband and wife will, where each spouse leaves the entire estate to the other spouse and names that spouse the executor.
Yes. in the state I live in.
No. The spouse should file an "injured spouse" form with the IRS.