Cleaning Victorian Hallway - Tile Advice

[Lcfclcfc]

Whats the going rate to clean and seal a victorian hallway approx 7sqm ingrained dirt little bit of paint, not been properly cleaned in 18 years? Best sealer to use they dont want a shine but like the look of it when they mop it?

 

[Flintstone]

Sounds like they want a colour intensifier. I’m not sure if you can do that to Victorian tiles, perhaps @timeless john can offer some words of wisdom.