Given that dimensionally transcendental engineering is integral to TARDIS design, the engines - and pretty much all of the rest of the interior - could be inside the console - even if they are also accessible via other rooms and corridors.
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And the console, like the TARDIS itself, could be bigger on the inside. So while we see a console, who knows what’s happening inside of it
Wow, this just blew my mind. I never thought about the TARDIS in quite this way kind of like a Russian nesting doll. I do recall in one episode with Tom Baker, Logopolis, the Doctor Jettisoned a significant part of the the TARDIS to escape a trap by the Master. This didn't seem to compromise the TARDIS in any significant way. I always imagined the lost room could be easily replaced given a little time and effort.
My take, informed mainly by The Doctor’s Wife, is that while a TARDIS console alone can move through time and space, it’s a bit like driving a card without a windshield, exhaust system, shocks and brakes. It may get you where you’re going, but the odds of you experiencing harm increase greatly.