As a note to avoid confusion with some of the pictures, I have made several versions of this truck and have pictures from all the builds so while the trucks may be different colors or different top styles, the actual modifications to the underlying body will be the same.
If you want a really basic setup, you'll need just a few things to buy:
1:10 Scale Traxxas Summit (DO NOT get the 1:16 scale version)
Pressed Steel Tonka Jeep from e-Bay
GoPro HD Hero or HD Hero 2 Camera (doesn't matter which version)
1x GoPro flat, sticky mount
1x GoPro J-buckle
1x GoPro extension
Just a few notes on the above items for however deep you go into the build. DO NOT get the 1:16 scale version as that is way too small. Yes, it's cheaper and a Summit but it won't work for this build.
When you look up the truck on e-Bay, use "pressed steel tonka bronco jeep" and you'll find it. Depending on the condition of the truck, prices will range from $25 shipped to $100+ for the really good condition trucks. If you're lucky, you can find one cheaper. If you're able to find a truck with the rack and gas can, that can add to the realism and it also makes for a good place to put the video transmission gear if you get your HAM radio license and go that far.
If you're making the really basic version, the GoPro Hero 3 will work fine too.
If you want to go all in, here are some more items you'll want:
7-8 channel radio system (I highly recommend the Futaba 9C if you can find it but the 2.4 GHz Futaba 8FG is fine)
1x Castle External BEC
1x Hitec HS-81 Servo
1x Futaba S3004 Servo
1x Hitec HS-55 Servo
1x Servo City Servo Blocks
1x Servo Stretcher
1x 3/16" Servo to Shaft Coupler
3x Servo Y-Harnesses
(Futaba style, not Gangnam style
4x Servo extensions
(Futaba style and you'll possibly want more than 4 if you add more accessories later on)
1x Traxxas T-lock
for differentials (If you have a 27 MHz radio Summit, it has one. All the 2.4 GHz stuff does not.)
1x Traxxas P2 Rockers
1x 4"x2"x1" project box
1x Dubro EZ Connector
1x Servo Reverser
2x Blind spot mirrors
1x GI Joe with Kung Fu Grip (e-Bay)
1x Barbie of your choice
1x Large zip tie
2x Thin, long zip ties
2x 6-32 3/8" screws
2x 4-40 1/2" screws and nuts, plus plastic spacers that go around the screw
1x 3/16" 2" long hex bolt (get lengths), fender washer, and lock nut
4-8x Large hitch pins
Hard foam to cut into small strips
Flat aluminum 3/4" x 1/8"
Double sided tape
Drill with a selection of bits
High-speed cut-off tool
Vice (not required but it makes things much easier)
S2 size square screwdriver bit
As a safety note, you should always wear safety protection when you work with any sort of tool, especially when doing this project. The cut-off wheel, especially, puts off a whole lot of sparks and you want, at a minimum, eye and ear protection. I would highly recommend eye protection, hearing protection, and while using the Dremel to cut away the plastic, a filtering mask of some sort as the fumes are pretty strong at times. If you need a parent's help, please get their help! It would actually be an excellent project to do together!