Most full size rental properties come equipped with dishwasher, cloths washer, and dryer - those that don't usually have access to washers and dryers. You should also find a broom and vacuum cleaner but probably no cleaning supplies. Televisions are found in virtually all rental properties, and many have VCR's. If multiple televisions are important to you, ask your rental agent. You can bring a TV, but reception by antenna is impossible on Hilton Head, so you are limited by availability of cable outlets.
Telephones are standard, but some rental companies charge for their use.
Local calls should be free but are not always. Plan to use a credit card for long distance calling, or call collect. The direct connect phone number for AOL is 341-3003. Blue Light and the other free ISPs are at 341-3103. I don't like my accommodations.