Credit Repair & Debt Relief Issues

I have atleast 4 major credit debts that was in the early 90’s i thought bad debt only remains on your credit for no longer than 7 years its almost over 10 years but they still show up on my credit reports. Is there anything I can go legally to take those off my credit history, Specially now that I am trying to rebuild my credit.

I am helping a family member get her life back on track. It looks like her best option may be bankruptcy.

If there is an unsecured, unpaid federal tax lien on her credit, will it be removed when she declares bankrupcy, or is it on there forever (unless she pays it)? I do not know how the situation came about, but the liens were placed against a home that was sold 10 years ago.