Buying 2nd TD

If I purchase a 2nd TD at Auction, do I need to overbid enough to pay off the 1st, or can I take title with existing first and either make payments on the first or wait until the due on sale clause forces me to pay off the 1st?

If you bid on a second and take title to the property you are still responsible to pay any senior liens or loans (including past due interest). If you bid above the amount of the 2nd any overage would go to lenders junior to the one you are bidding on or to the homeowner — NEVER the first or other senior liens. Always make sure to do your research before bidding at trustee sale. One small mistake can cost you a bundle.