Can I get personal property back after it was taken by the leasing company that also evicted me?

Sorry, but you can't get this stuff back. The leasing company was entitled to what is known as a "Landlord's Lien" over your items. When you failed to pay the rent you owed in a timely fashion, they were allowed to sell your property to cover the outstanding amount of rent. Anything left over after that should have been returned to you. You should ask for an accounting to see where you stand. You may still owe them money.