If we could answer this question in two words, we would either be liars or powerful soothsayers!
Being neither, we can only play the honesty card: it depends.
A website is like a house. You can have a small bungalow or a huge villa with all the comforts. It’s still a house, but it doesn’t have the same price.

It’s not so much the number of pages that makes a website expensive, but its complexity and the level of interaction/animation that is desired.
Does it require links to external platforms or servers? What type(s) of information and data must pass through, and what interactions are expected with them?
What is the complexity of the modules that will have to compose it (do you want a simple photo or should it be animated with effects? Do you want a simple list or a filtering system with several entries? Etc.).

To give a very broad range (which would then look more like a rake), a team of professionals can start providing a functional website (very basic, but with a clean design) from 3,000 euros. Some particularly complex sites will cost between 10 and 20 times that amount.
The average, however, for a website that is ergonomic, aesthetic, well thought out (with workshops in addition to design and development), with simple animations and built with a Content Management System that allows you total autonomy in managing it and building new pages, is around 15,000 euros.

Please note that these are only averages, estimates, all estimates are different. The best way to find out how much a website costs is to ask us the question and describe your wishes. Then we can give you a good answer. And only then can you make a good decision.