I’m trying to plan a water system for a house in an area with low water pressure. I’d be using the municipal water to fill a 1000 liter above ground storage tank and use a bladder tank to supply the need water pressure. My house has 5 bathrooms with one on the 3rd floor, kitchen and laundry.

What type and size of pump would you recommend?
Would a 42 gal bladder tank be adequate or would I need something bigger?
If the storage tank empties, what would I need in order to stop the pump from running?