How do I figure out the temperatures of certain latitudes on a planet with factors such as sunlight and the emission of heat and energy from a planet's interior assuming thr planet is smaller than earth that is warm enough that even its soil could be 80 degrees Fahrenheit yet is still cold enough not to lose its oceans? These oceans can have a warmer oceanic crust and should be larger but shallower than earthsl's oceans. The pkaent as a whole should have elevations like Venus with fewer areas of high and low elevation in comparison to earth. Particularly when the planet has no seasons and should be tropical by earth standards across it's surface? Ex: how do I figure out the temperature of the tropics if the poles are as warm as our tropics?

Yes it does have plant life that uses h20 and photosynthesis And as you can deduce if its poles are as warm as death's equator than the planet does not need to orbit a different spectral type than earth and can have a fairly similar orbit. There is still the question of the planet having different plate tectonics but more volcanic gases which was lost from description. The atmosphere should have a very similar amount of nitrogen. I think oxygen wiuldnbe effected by plant life and the mentioned increase in volcanic gases but shouldnt be dramatically high at least in comparison to the history of earth if this helps with density any.