Your vehicle was supplied with a jack for emergency road repairs. This jack is adequate for the job it was designed to dofor changing a flat tire in an emergency where you are NOT required to go beneath the vehicle. If it is used in an emergency situation, carefully follow the instructions provided either with the jack or in your Owner's Manual. The Toyota truck Owner's Manual have good coverage of how to use their jack in an emergency. Do NOT attempt to use the jack in any places other than specified by the vehicle manufacturer. Always block the diagonally opposite wheel when using a jack.
A more convenient way of jacking is the use of a garage or floor jack. NEVER place the jack under the radiator, engine or transmission components. Severe and expensive damage will result when the jack is raised. Additionally, NEVER jack under the floorpan or bodywork; the metal will deform.
Whenever you plan to work under the vehicle, you must support it on safety stands or ramps. NEVER use cinder blocks or stacks of wood to support the vehicle, even if you're only going to be under it for a few minutes. NEVER crawl under the vehicle when only the tire-changing jack or other floor jack supports it.
Small hydraulic, screw, or scissors jacks are satisfactory for raising the vehicle. Drive-on trestles or ramps are also a handy and safe way to both raise and support the vehicle. Be careful though, some ramps may be too steep to drive your vehicle onto without scraping the front bottom panels. NEVER support the vehicle on any suspension member (unless specifically instructed to do so by a repair manual) or underbody panel.
The following safety points cannot be overemphasized: