Thanks for the links. Skids and sliders are definitely on the list. You think armor before suspension/tires?
That is always debated. As Mac said, there are a lot of trails you can do in stock form.... my point is that if you get into something tougher with large rocks, stumps or logs, the possibility of body or under carriage damage goes up. I often travel to VERY remote locations in the High Sierra's or the desert and am unwilling to risk being stranded or being forced to leave my rig behind due to a mechanical problem. I prefer to err on the side of safety....
If you plan on doing a suspension lift, it can be tricky picking the right springs to support the added weight of skids, sliders and bumpers. I'd suggest that you read up on the other Tacoma owners build threads to get some idea's for suspension upgrades. It really depends on what kind of terrain you want to explore.
The mod bug can bite hard and infect your wallet quickly, so starting with a few easy trails and seeing how you like it is a good idea.