The city centre is compact and walkable. From Coventry station to the cathedrals is about twelve minutes on foot; from the cathedrals to the Transport Museum is another ten minutes walking west through Millennium Place. FarGo Village on Far Gosford Street is the furthest point most visitors bother with, about fifteen minutes east of Broadgate.
Coventry has a local bus network run by National Express West Midlands, which covers the broader city and suburbs, but you will not need it for the centre. There are no trams. Taxis and ride-hailing apps are available if your legs give out.