Start simple with a single stage. Learn what it takes to do each stage of the process right. Once you decide you like it you can always move up to more expensive equipment.
I have been reloading rifle, pistol and shotgun for over 20 years. You do not need a $500 press to get stated. i still load eerything on a single stage, have NEVER loaded a squib load and have enjoyed it.
If you are not saving a substantial amount of money reloading, you are not doing it right! Bullets by the 500 count when possible, powder in largest quantity you can afford and primers by the 1000 at least.
Example: 45 ACP, Cast 230 gr, $5.60/box of 50. NOT counting the cost of brass since it gets reloaded many times.