As a beginner, you will probably lose a lot of golf balls, so buy cheap. Brand-name balls are largely a personal preference. We happen to prefer the ones that are the least expensive at the time. It's a good idea to have a dozen or so balls in your bag when you play your first round. You probably won't lose that many, but it's better to have some spares than to have to ask your playing partners for loaners.
Tees are one of the few things that golf-course pro shops offer at a reasonable price.
Sure, you can be macho and carry your bag for 18 holes, but that can be very wearing. So take lessons. In most cases, a professional will help you develop your individual swing. Virtually every golf course offers lessons. It's an indoor facility.