What year is this MacBook Pro?

Or use:

Check Your Service and Support Coverage - Apple Support

The other link will work best for very old Macs.

Will the computer not start? If it will start, that is the easiest way to see the year of introduction, from About this Mac. FIdn the "sub-model.":

dhanuka113 wrote:

What year of MacBook Pro this

If this is your Serial number(?) it will be redacted.

You can check yourself: https://everymac.com/ultimate-mac-lookup/