You asked
What lenses should I buy for the sony a7c ii?
For most people, I'd start with a standard zoom and one cheap prime. The Sony FE 24-70mm f/2.8 GM II covers everyday shooting, from street to travel to people, and it's the lens I'd buy first if money allows.
If you want something lighter for the same kind of shooting, the Sony FE 24-105mm f/4 G OSS is a sensible alternative.
For a small, cheap prime that makes the camera feel like a rangefinder, get the Sony FE 35mm f/1.8. Add the Sony FE 50mm f/1.8 if you want a classic portrait focal length on a budget.
If you shoot sport or wildlife, the Sony FE 70-200mm f/2.8 GM OSS II is the one to look at, though it's a bigger investment.
Written by Claude from this site's pages.