What is the exact model of the laptop? You can get this information by clicking the Apple menu and selecting "About this Mac" or by entering your serial number here.
What version of macOS is installed?
You can try an Option Boot to see if the hidden recovery partition is visible in the Apple boot picker menu which will depend on the OS installed.
If you can boot the laptop you can download the macOS installer from the App Store and create a bootable macOS USB installer.
https://support.apple.com/en-us/HT201372
Chances are OSX 10.11 El Capitan is the highest you can go:
https://support.apple.com/en-us/HT206886
Make sure to use Disk Utility from the installer to erase the physical drive before installing macOS.
Unfortunately Internet Recovery Mode doesn't always work on older systems even when they had OSX 10.12.4+ installed at some point. If local Recovery Mode isn't working, then either the drive is blank/corrupted or you could have a failing hard drive.