Most of the people who come to Baidu to ask about SLR are newbies. I am a Canon user, so I recommend Canon. Nikon and Pentax are also good.
If you have a lot of money and a budget of 20,000, you can consider the 5D2 24-105 kit. Full frame is great! And the price is very right now. Although it is a previous generation machine, all the functions are sufficient.
If you only have a budget of 15,000, you can consider a 60D or 7D kit. A machine with good performance in APS-C format.
If the price is less than 10,000 yuan, I only recommend 600D 18-135 50 1.8. Newbies don’t know what they like yet, so I recommend this set. Sufficient and easy to use and not expensive. You won’t lose much if you sell it second-hand in the future. 50 1.8 is a lens that can last a lifetime
The second question is that the most basic components of a complete SLR are the SLR body, lens, memory card, and battery. Of course, if necessary, you can buy accessories such as tripods, shutter cables, flashes, handles, etc.