This site is run by a company that supports university applications and whilst its university database is not exhaustive, within the application requirements tab on each university profile they have the average IB scores accepted and where available the application success rate.
They also have average living costs for the area, rankings overviews and some scholarship information.
Be aware that they list programs in all languages, not just English and the IB scores and success rate percentages are averages across the whole institution. However, they are a good indicator if the university does not publish more detailed information.