No known planet besides Earth has both oxygen and fossil fuels for energy, and so Mars will need either something on the order of electrical solar cells or nuclear for energy. If you are talking nuclear, you will need to find viable uranium and thorium ores, use some sort of energy reserves to purify it, and then that could be the starting point for more energy sources for building solar cells or mining and purifying more uranium ores.
At some point this energy could be used to melt part of the polar ice caps for cooling of the reactors, and the filling and warming of large insulated chambers
and caverns with water and carbon dioxide for food. As for lighting for plants, it is not obvious whether artificial lighting of an area insulated from the cold Martian environment might be better than trying to create something transparent for solar input but still capable of insulating from the extreme cold of Mars. Probably some of the direct heat from the rods could be sent to an alternate high temperature chamber for metallurgy, but it is not obvious whether something like electrolysis for aluminum might be better anyway.
On Earth, the most standard way of reducing iron involves fossil fuels and oxygen.
On another planet, where those are not available, it is not impossible that reducing other metals might potentially be more favorable because of alternate methods being needed.
It is not obvious whether the Moon or an asteroid like Ceres or something like Phobos could be better than Mars because of the lower gravity wells, or Mercury because of the solar inputs. As for Venus, I have read about the possibility of floating balloons very high in the atmosphere where the atmospheric pressure is more similar to Earth, filled with oxygen as a lift gas, but I would be averse to falling from the balloon.
Mars however is very high on the list for livability behind Earth, either for robots, humans, or genetically engineered intelligent organisms designed to withstand the vacuum of space.