Quick woodworking questions

Hey, my name is Connor and I am wondering if someone can help me answer these questions: 1) What is the best finish to apply to a cutting board, or something that needs to be food safe? 2) What are the most necessary tools or machinery any woodworker should have? 3) What are your favorite / most used finishes? 4) How do you know what type of wood finish to use based on different projects? 5)What is your most used tool in your workshop?