What would have been the approximate surface temperatures and pressure on Venus if its atmospheric composition was like the Earth's that is ,being composed primarily of nitrogen and oxygen,rather than CO2 ?
Other factors being equal, planetary temperature (measured on an absolute scale e.g. Kelvin) falls with the square root of distance from the sun.
With a semi-major axis of 0.723 AU, we would expect Venus to have an average planetary temperature about 1/0.85 that of Earth’s 288 K: 339 K or about 66°C or 150°F.
Since surface temperature is largely regulated by atmosphere and hydrology, which effects are in complex feedback loops with temperature, the actual average temperature at the surface would likely be very different — and with enough water vapor in the air it might still go into a runaway greenhouse feedback loop.
In any case it would likely be substantially higher than human body temperature, making it unsurvivable without active cooling.