Cleaning mould/soap scum (2 questions in one...)

[entreat]

CLR removes calcium, lime & rust deposits - you could try that. You can buy it in a concentrated form, or I've seen a spray bottle at bunnings, I think.

I used Easy Off BAM for my bathrooms, and I keep a scourer in the shower to attack the floors while I'm showering.

[Rivlas]

To clean bathroom tiles - sponge with quarter cup ammonia in 4 litres water
Baby oil and a damp cloth
Vinegar is also good for cleaning the grout