Any products sold from Nikon as refurbished are almost good as new. They replace any parts that are defective, clean the sensor, check auto focus, etc.
Re: D700. It is best if you figure out what you are going to take pictures of. Don't rush in getting a whole bunch of lenses like what I did. Do your researches and save money for that lens. As a reference, 24mm on FX is pretty wide for group shots or landscape. Nikon D lenses are a good start and are much cheaper than the G lenses but they have their trade-offs since the newer lenses are much sharper.
I would start with the Nikon 50mm f1.8G and 85mm f1.8G. A 24mm f2.8D prime lens will be a good addition to cover the wide end.
You'll be buying additional items such as CF cards, extra batteries, and possibly a battery grip. So, be aware of these items that can add up to your total cost.