Get quotes on timber and tile. Tiles can be cheap but the laying is quite expensive. You may be surprised at the cost difference.... it could be quite close so don't discount it all just yet. If you have resale concerns then avoid laminates as they're seen as a cheap choice. For me I'd grit my teeth and pay for a solid timber floor everyday unless in wet areas where I'd use a classic and timeless tile.

It's the floor colour that's the main problem, neither one thing nor the other, and certainly wrong with the benchtop. Leave the wall tiles if you like that sort of thing and find a way of covering the floor probably with laminate planks on an underlay. We have a European Birch golden coloured timber floor but softer grey splashback and it looks fine. It's not an award winner but the floor and cabinet carcases had been there twenty years and it was affordable. Don't even think about painting the floor or putting down mats but a clear plastic runner in front of the sink works well for us.

because the water could seep through the joints between the new tiles and sit between the two layers and affect the seal and also raise the height of the floor and affect the slope to the waste outlets..but, why do you want to retile if you're not using the bathroom??...for immediate resale consider bathroom wall to wall bathroom carpet, new wall paint, new vanity, taps and light fittings which should also be cheaper than tiling over the top and, if it's not allowed by the body corporate, it will be a risk to future sales as it should not satisfy a proper building inspection

Have a good read of this article. http://www.tilewizards.com.au/installing-tile-over-tile-pros-and-cons/. Beware that if tiling over tiles your floor will increase in height of tile and adhesive cement. Therefore the bottom of your doors will need to be adjusted because they might not open. (Carpenter needs to take door off the hinges and cut off the bottom of door that is the wrong height). Your skirting boards will need to be removed, then re installed. If you having aluminium sliding doors, then the new height of tile may look silly. The height of the tiled floor may not be even with your bamboo floor, and cause a tripping hazard. Also if the floor underneath your existing tiles is wood, it might not be strong enough to take the weight of two lots of tiles. Trying to save money on not taking up existing tiles, may cause extra costs in other ways.