The Vodavi STSe is a non-restricted product and comes with all documentation in the box. It will do everything you need. It's available, along with all other parts that you'll need from any Graybar branch. You can also check the product out at
www.vodavi.com.Note that this isn't a trade that you'll pick up overnight. Running cable and installing sophisticated phones systems aren't quite the same. There is a lot of terminology and tooling that you'll need to learn from scratch. You might want to consider partnering with a dealer that's located in your area to get your feet wet with this product. The website I mentioned also includes a dealer locator tool.
