For $20 you can buy a kit that replaces all the working parts of a toilet. ie everything but the ceramic parts and the seat.

Or the "brand new tile" floor is peel and stick tile placed on top of the busted up old ceramic tiles.

Now my wife and I do the ceramic tile work, and the connection of the plumbing to the sinks, install the appliances, interior doors and vanities.  

ONe of my clients that I fund in Chicago does a really great job.. they take their homes to the studs each and every time... all new plumbing new Hvac new roof new electrical panel and all new wiring Windows usually.. new insulation sheet rock all new cabinets slab granite counters full ceramic tile. 

., don't use 2x4 framing in places where you need R-20 insulation) -- this reduces your need for expensive insulation solutions.Also as Karen and others have said, buy materials that are decent but can be had inexpensively -- ceramic tile, carpet, less desirable granite slabs, etc.

They're not the greatest, but I did my first ceramic tile job after going to their workshop.

You could always opt to put in ceramic tile or hard wood floors in place of carpet. 

looks good. though I was never a fan of that wood looking ceramic tile...but that's a personal preference....

I'm not sure if it's ceramic, porcelain or some other kind of tile but my question is whether the mold would get into the grout or the tile itself?

That being said, some common themes we see are lots of dark stained hardwoods (people are starting to ask for wider planks), wood stained front doors, ceramic tile or natural stones ( we don't do any laminate or vinyl products), painted cabinets (generally a white or gray), combined with an accent piece (could be an island or wet bar area) of a different color.