It's practically impossible to give an accurate estimate over the phone. We really need to know facts about the building work to be done (location, accessibility, general state of the apartment or commercial premises, inhabited or not, etc). To give some idea of an approximate quote, we could change your old bathroom accessories - toilet, sink, bidet, - for new ones for as little as Euros 200 plus cost of accessories. The old bathtub can be changed and adapted to a new shower for some Euros 350.
Labour costs for a kitchen or bathroom wall tiling will be approximately Euros 9.50 per square metre. Floor tiling for approx. some Euros 10 per square metre. Painting jobs on flat surfaces with white paint: Euros 9 per square metre (cost of paint also included).