Hello and thank you for your question, I look forward to assisting you today. Unfortunately you can't. Your Chromebook is tied directly to your Google account. Have you been able to login to your Google account from any other computer?
I would not be able to remote into your Chromebook if you are unable to unlock from your end. When you enter your password, what is the message that pops up? Also, if you have a guest account setup, you can try logging in with that. Can you also provide me with the model number of the Chromebook please?