So...are you asking what tools you would need to carry, or where to get a printed manual?
Unfortunately it takes more than screwdrivers and wrenches on today's vehicles. A good diagnostics computer has been required to find/fix the last two problems I have experienced on my JK. First problem was when my battery died causing the computer to "forget" the accelerator pedal, requiring the dealership to use a laptop on the CAM system to "re-learn" the accelerator pedal position. The symptom was after replacing the dead battery the engine would only idle no matter how far the accelerator pedal was pressed until it re-learned it. The second problem was anti-lock brake sensor failure, which causes failure of cruise control and the electronic stability control to quit working. On that problem I could have thrown new sensors on until the problem was found but fortunately a good friend has a Snap-On diagnostic computer and he located the failed sensor for me and it was it only cost me the $25 sensor and bought his 2 man shop burgers for lunch.