If anyone wants advice on gas/central heating/boilers. feel free to ask

Also, on another post I did earlier, I asked about having different locations as zones, each with a separately programmed temperature (never got a definitive answer)

zone 1: towel rads, always on 24x7x365
zone 2: upstairs, warmer 24x7xwinter only
zone 3: downstairs, cooler than upstairs 24x7xwinter only

If I had such a system, would I want/need TRVs on each rad? How much would such a programmer cost?