How many wheel chocks and jack stands do I need to do my own front brakes?

[RMcG]

I've never done my own front caliper brakes, but it does not look hard, especially if I just change the pads and rotors. But I want to do it safely, so I am interested in knowing how many wheel chocks and jack stands I need to do the job safely. I plan to do the job outside this summer on a surface that is pretty flat with very little slope. I have the OEM factory jack that came with the car new and another similar jack that came with my old 1995 Honda Civic.

QUESTION(S): How many wheel chocks do I need, 2 or 4? And how many jack stands do I need, 1 or 2? And can I use one or more 2 ton jack stands or do I need something heavier duty?

I am interested in first checking the thickness of the pads by taking the wheels & tires off and checking the thickness of the inside & outside pads. (I want to do this, because I don't trust the assessment of a local shop here that did a free brake inspection in the Fall of 2023 and advised new brakes (and calipers and struts) by the end of 2023. It is now, of course, ~6 months after that and everything is working fine and no noise from the front brake wear indicators and the car is handling fine.

Thanks,

R.