Yes.
Yes.
No. The word, "Foil" contains one syllable. The way people sometimes say it, "foy - yuhl" sounds like two syllables, sometimes.
Yes
It has one syllable (though four phonemes, since its vowel sound is a diphthong).
The word "coy" has one syllable.
Yes the word skull is a one syllable word.
The word bruised only has one syllable. This means the whole word is the syllable and so there are no syllable breaks.
Crumb is a one syllable word.
one syllable
one syllable
one syllable
one syllable