If you’re a beginner I would start with a dumbbell set, the lighter weight sets are inexpensive an extremely versatile when it comes to doing different exercises. I usually have my beginner clients use dumbbells exclusively. If you’ve seen the video with my female client, the total price of the equipment I had her use I would estimate was under $500.
In order of importance this is what I would purchase if I was a beginner and was setting up a fitness room.
Work out bench
Barbell and barbell plates