Yes you do. For example in the sentence "Their restraunt is family-owned." You would not say "Their restraunt is family." or "Their restraunt is owned." I hope that helps!
There is no need to hyphenate this expression.
Since the word refers to an attribute relating to the noun, it would be advisable to hyphenate Italian-sounding. Don't forget to capitalize the first word of the phrase.
Always
You do not need to hyphenate.
You do not hyphenate the number.
You hyphenate it only at the hyphen.
Don't hyphenate; ongoing is one word.
You would hyphenate "thank you" when it is used as an adjective before a noun, such as in "a thank-you card."
I think it's more accepted to hyphenate it.
Can you, or should you? You can hyphenate it if you're moving between lines in a paragraph and need to break up the word. You shouldn't hyphenate it normally.
Any hyphenated word(s) or phrase does so without the use of spaces. So, hand-in-hand would be the result.
According to this style guide, yes it is hyphenated, though from standard rules it doesn't seem as if it should. http://www.gbps.org.uk/gbj_style.htm