I brought a MacBook Pro today. What’s the password to it? I saw my receipt that shows the password that I have to type in but it was incorrect.

Call and ask. You have 24 hours to return it also if there's any problems. If you opted to pay for the protection plan you have 6 months to return for full store credit or trade in for the full value you paid for it.

You should go back to them or call the number on the receipt