I have a Kocaso M736 and I can't remember my password to get it started again.

option 1: While the power is turned off hold the power button and up volume button by pressing them. Keep holding them until something appears on the screen. Then release and you should be given the option to erase all the data from the Kocaso tablet

option 2: there should be a tiny pinhole sized button on the back of the device. stick a clutch-pencil tip (or a pin) into it to reset it

Use the camera app. Here is the manual with webcam pointing at you.
http://www.kocaso.com/manuals/M736/M736_User_Manual.pdf

If you set a pass code (or pattern) that you cannot remember, please enter the wrong password (10-20 times) until you are prompted to sign in via your google account. Please note, this will only work if you have already setup your google account on the tablet. If you have not set up a Google (or Gmail) account on the tablet, you will have to perform a firmware install, which will revert the tablet back to factory settings.

Support Troubleshooting Guide

If you set a pass code (or pattern) that you cannot remember, please enter the wrong password (10-20 times) until you are prompted to sign in via your google account. Please note, this will only work if you have already setup your google account on the tablet. If you have not set up a Google (or Gmail) account on the tablet, you will have to perform a firmware install, which will revert the tablet back to factory settings.

Support Troubleshooting Guide

The reason you cannot do this is because the Kocaso M736 does not have a back camera on it. I know this because i went through the same thing as you when i got my Kocaso M736.

If you set a pass code (or pattern) that you cannot remember, please enter the wrong password (10-20 times) until you are prompted to sign in via your google account. Please note, this will only work if you have already setup your google account on the tablet. If you have not set up a Google (or Gmail) account on the tablet, you will have to perform a firmware install, which will revert the tablet back to factory settings.

Support Troubleshooting Guide

Sounds like you may need a new battery.
Terry

try this

how do you change the date and time on a kocaso-m736

Have you tryed the reset button???