A home usually "shows better" if it is furnished, but it is important to also make sure it is un-clutteredand as clean as possible.
If the furnishings are in poor condition, it would be advisable to remove those if possible.
But, if you have nice furniture pieces, it will enhance the property. If you have a good sense of style and decorating, make the home look as inviting as possible. Curb Appeal is key to get people to want to come in- and you want to make an equally good impression when they do enter.
If, you were referring in your question as to whether it is better to sell the furniture with a home, that is better done as a "bill of sale" item, outside of the transaction.
Good Luck to you!