Toyota 4runner 2010 Instruction Manual page 596

Starting the engine when the battery is discharged
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The engine cannot be started by push-starting.
To prevent battery discharge
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Turn off the headlights and the audio system while the engine is off.
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Turn off any unnecessary electrical components when the vehicle is run-
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ning at a low speed for an extended period, such as in heavy traffic.
Precautions when the battery is discharged (vehicles with a smart key
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system)
In some cases, it may not be possible to unlock the doors using the smart
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key system when the battery is discharged. Use the wireless remote con-
trol or the mechanical key to lock or unlock the doors.
The engine may not start on the first attempt after the battery has
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recharged but will start normally after the second attempt. This is not a
malfunction.
The "ENGINE START STOP" switch mode is memorized by the vehicle.
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When the battery is reconnected, the system will return to the mode it
was in before the battery was discharged. Before disconnecting the bat-
tery, turn the "ENGINE START STOP" switch off.
If you are unsure what mode the "ENGINE START STOP" switch was in
before the battery discharged, be especially careful when reconnecting
the battery.
5-2. Steps to take in an emergency
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