4k for the pc including 2x 4k monitor (1 has built in speakers), keyboard, mouse, headset and windows 11
dont know anything abt desk but this one looks ok and sturdy for $170 https://www.amazon.com/dp/B0B3SW5Z4L/
for chair I wld look for a used herman miller (aeron is nice) for like $300? or take sth like this $170 one https://www.staples.com/Staples-Hyken-Technical-Mesh-Task-Chair-Black/product_990119 mesh is so much comfortable than leather for long use lol. leather u get hot and not that great support.
and finally, u probably need a desk mat. consider this one: https://www.amazon.com/dp/B09DV8WKK8/