Step 1: Warning!
Do not allow clamps to come into contact with any other pieces of metal except the actual specified areas.
There is a chance for electric shock if done incorrectly. Be sure to follow every step properly.
Step 2: Gather Materials
Another car (preferably with a battery that isn't dead)
Jump box (alternative)
Step 3: Release Hood
Step 4: Lift Hood
Step 5: Prop Hood
Step 6: Find Fusebox
Step 7: Remove Fusebox Lid
Step 8: Find Positive Battery Tab
Step 9: Lift Positive Battery Tab
Step 10: Positive Cable Clamp Placement
Step 11: Negative Cable Clamp Placement
Typically there will be a whirring sound once power has been restored.
Step 12: Press and Hold Brake Pedal
Step 13: Press Power Button
Step 14: Dash Should Display Ready, Follow Next Steps If Not.
If you have power you are done. If not, follow the next steps.
Step 15: Open Rear Hatch to Access Actual Battery
Sometimes the power isn't adequate and you have to jump it on the actual battery, which is in the rear.
Open the rear hatch by pulling on the lever in the middle right above the license plate.
Step 16: Find Battery Panel
The red arrow designates where the battery panel is.
Step 17: Remove Battery Panel
Step 18: Find Positive Battery Terminal
Step 19: Positive Clamp Placement
Step 20: Negative Clamp Placement
Step 21: Press and Hold Brake Pedal
Step 22: Press Power Button
Step 23: Dash Should Display Ready!
If you still don't have power, I would recommend somehow getting your vehicle to your repair shop or local Toyota dealer.