the first thing is make sure its maintaned
recovery gear is second after maintenance this also includes things like flashlights and offroad lights. harbor freight has a bunch of cheap halogen lights for like $15 a set, and they come in handy if you need them.
third is find a buddy with an offroad vehicle with similar capabilities, when i started wheeling i found another guy that had a 4runner as well. it makes choosing lines easier and more fun since you are evenly matched. dont go out with someone in a mini taco that has 2wd youll be waiting for him the whole time and probably have to pull him through the harder stuff. if they have a built rig but arent experienced with your vehicle they wont be able to help you pick lines when you get stuck, and they will be waiting on you to hurry up, which is no fun.
fourth a lift can be cheap if you use used springs. for example A friend and i went to a junk yard and got a set of tundra springs for 90 bucks, i got lx450 springs for 60. the rear shocks were 80 from toyota. the new front shocks tundra 5100 adjustable, were around 220 from wheelers. the panhard bar is not nessesary at all, and extended brakes are only needed if you are over 3.5" of lift. All together $450 for a great riding lift even for a dd.
the lift is like an armor itself since it makes it less likely for rocks to hit the truck, you dont need armor if you aren't close to hitting stuff. also you are more stable in situations that require more flex, and those tundra springs and shocks are super soft on the bottom perch so your back and kidneys will thank you.
Tires are good as well, but I think the lift comes first as its cheaper and also dictates the size of tire you can have. bigger tires also add lift obviously.
armor should be added as needed, except sliders because the back and front bumper bolt on, the rockers are not.
anyways, take your time building up your truck, if you dump a bunch of money into it overnight you wont get to enjoy the process of improving your truck.