Can a lawyer hired by a collection agency garnish you wages or put a lean on your house on a debt over 10years old even if you stopped paying on it 1 year ago?

Yes first they have to get a judgment against you but the fact that it is over 10 years old is irrelevant It is your last payment that keeps the statute of limitations going and they vary from state to state and depending on what the original debt was for. If your last payment was about a year ago you will have awhile before they can't pursue you anymore.