Chapter 7 and 13.

No. Some debts are not dischargeable. Exceptions exist for particular debts, e.g. child
support. Liens, such as mortgages, are still enforceable. You may also be denied a
discharge if you have committed improper conduct such as fraudulently obtaining credit. Student loans are generally not dischargeable.

Anyone who is under the median income. Whether you are eligible is determined by
taking a six month average of your income and comparing it to the state's median
income.

You can file pro se (by yourself), but bankruptcy is complicated. You are better off with an attorney.

Unless you have incurred most of your debt before your marriage, you should file with
your spouse, who has presumably benefited from the debts. You may have used credit cards for household expenses such as groceries. Spouse should also accept responsibility. On the plus side, it doubles exemptions.

You should file before any liens (judgments) are placed on your property. It is too late to file if a judicial sale has occurred.

Not usually but it does happen.

A trustee is an attorney (usually) who administers the case. Normally, that means
conducting a meeting of creditors to determine if the schedules are accurate and that there are no assets that can distributed to creditors.

The property is liquidated and distributed to creditors who have filed a proof of claim.

Usually you will keep everything. Bankruptcy exemptions are quite generous.

You may voluntarily pay a creditor after the discharge, not before.

A no asset Chapter 7 normally takes 4 to 6 months.

No.