The location of the documentation for the Basic script commands varies a bit depending on the version you are using. For example, in PADS 9.5, go to Help > Documentation > PADS Layout User's Guide and Reference Manual > open PDF. Search for Automation and look at the section with "Component.". For PADS VX.1.1 go to Help > Open Documentation > PADS Layout Command Reference Manual > Open PDF. Search for the section with "Component.".
The Part List reports can be customized to include the property values you want by following the section on creating a custom part placement report in technote MG21428 using the PADS Layout Script Wizard.