To find out what old tools you have, it is beneficial to start by organizing and categorizing them according to their types or functions. This will allow you to better understand what you possess and make it easier for further identification. Researching specific markings or engravings on the tools can provide clues about their age or manufacturer. Utilizing online resources like tool identification websites or forums dedicated to vintage tools may also prove helpful as fellow enthusiasts might share their knowledge based on pictures or descriptions of your tools. Attending local antique fairs or contacting local historical societies can offer opportunities for expert opinions as well.