French wiktionary (and probably others) fr.wiktionary.org usually have the IPA info.
What rules do you need aside from IPA and syllables? Most Latin languages have automatic syllabic rules (not random as in English) so you wouldn’t even need a dictionary to derive them. Korean letters are grouped by syllables as well so it’s even more straightforward (한글 : 2 syllables, 조선글 : 3 syllables).
As for frequency of use, it’s more difficult for languages whose words change depending on their grammatical function, but an idea would be to use a selection of movies with good dialogues and derive the word frequencies per translation.
