Typically turnkey means the property comes furnished. Each listing can vary somewhat and may not include sellers personal property so it is best to check with the Realtor for specifics or possibly an inventory list.
Turn key properties are especially appealing for second homes and rental properties, where the new owner does not intend to move furnishings and personal items. Turn key properties typically are ready to use immediately.
I hope this answers your question. Feel free to contact me if I can be of further assistance.