The current (5th) Generation Toyota 4Runner comes with an arsenal of offroading tools to help you conquer the trail. Some of them can be confusing, but they're all pretty simple systems to understand. Here's a video showing what they do and how they work. The best thing you can possibly do is to get out there and try them yourself. I hope this teaches you about ATRAC, the ELocker, Multi Terrain Select, Crawl Control, and how to use them all.