A side question is what do they use for energy? I assume magic because, well, magic but is there something else? And if they're using magic that potentially puts them in a post-energy-scarcity world. That's going to change how a lot of things look and act. Imagine how our world would look with infinite "free" energy. Who cares about gas mileage on your car when it is free magic? Who cares about leaving the lights on? Climate change would abruptly stop being an issue because the energy-intensive ways to remove excess carbon dioxide from the air would become instantly viable at a trivial cost of energy. A few wealthy investors (Hi, Bill Gates!) could fund solving the problem themselves - let alone what interested governments like, say, China could do.
I'd personally recommend they either use mixed forms (electricity where it makes sense, magic where it makes sense) or have there be costs to running a "mana generator" to keep energy prices involved in the economy.
On this part, apparently it was an aspect that would have been explored in detail if Force wasn't canceled, with some implications that there were problems behind the reliance upon Mana Reactors.
Given what happened in the backstory of the Testarossa family, a Mana Reactor isn't something that is
inherently safe, but something that needs proper safety measures like any other.
That said, what we
do know is that Mana Reactors are the main method of Electricity generation in Administrated Space, and electricity is the main method of powering things.
Also, the implications surrounding Mana is that it isn't infinite, but pretty much functionally unlimited due to Mana being like Hydrogen and being pretty ubiquitous.
The other thing we do know is that Mana Reactors are not seen as the best idea in Administrated Space, and Researchers are looking for next Holy Grail in Power Generation.
Oh, and on Cars: apparently, their automobiles and motorcycles use something
not magic in their Engines.
What we do know for
sure is that the Engines for such transport use a chemical reaction that involves Water and some chemical cocktail that results in only vapor and some other residue being spat out.