Any auction company will help you with this, but anticipate getting next to nothing for the personal effects. And the auction company will take a percentage of the sale, plus their fee, and that includes a percentage on the house price. This means that the purchase money paid by the buyer of the house will probably go directly to the auctioneer.
That might work; if all you're concerned about is getting rid of the place:
In my opinion; an Auction might yield 50 cents on the dollar and the personal property would fetch less.
You can talk to a local Realtor about the legalities, but I sure wouldn't include the "contents" with the sale.
Good luck and may God bless