Not sure what a pressure suit is, but I won't ride without a chest protector/roost deflector.

The pressure in an astronaut's suit helps venous return; in other words, it helps blood get from body tissues back to the heart.

No sincetest have estment that the heat is 1/10 of the sun and no heat suit will survive 10,000 Celsius

as for pressure.... i dont know

That is a pressure suit or G-suit designed to squeeze the blood from your extremities toward your head and heart

During the Apollo EVAs, normal suit operating pressure was about 3.8 psi

The Space Shuttle/ISS Extravehicular Mobility Unit (EMU) operates at approximately 4.3 psi.