If the next doctor was me.
First words: “Ten more minutes and I’ll get up”
Last words: Stop it, it tickles.
Attire: Blue overalls, flat cap. Sonic screwdriver would have a spanner setting and I’d always carry an oil cloth.
Personality: possessed by mechanical curiosity and an overriding desire to take things apart and put them back together. Stops to help everyone in need and shares amusing anecdotes with anyone that listens. Accent, same as Jodie’s.
Demise: Salmon Mouse at a dinner party.
Tardis console room: Steam and diesel punk. Blue brick walls, brass panels, copper pipes, chimneys, wheels and gears. Victorian engineering meets fifties motoring memorabilia. The console itself would be cracked ceramic with bakelite buttons. The floor, a steel grid above clanking machinery.
ETA: Might as well do the whole series concept, for fun.
Companion: A goofy well meaning middle aged woman, a bit like Sue Pollards Peggy from Hi De Hi. She doesn’t know it, but she wears a charm bracelet that keeps her safe and attracts good luck. It also attracts two opposing forces of good and evil spirit line beings that follow her across the universe trying to take it from her.