Hyphens not needed
Yes it should.
no hyphens - 57 years old is what you are.
Yes it should be hyphenated.
If you're using the phrase as an adjective (example "This easy-to-use remote is great!") then it will definitely need the hyphens. Otherwise, the hyphens are incorrect.
If you're using the phrase as an adjective (example "I hate the end-of-the-year audit!") then it will definitely need the hyphens. Otherwise, the hyphens are incorrect.
It should be "up-to-date". You will see it in many instances written "up to date" without the hyphens, where each word becomes a separate and different part of speech, which may be confusing. (Hyphens are grossly and woefully under-used in adjectives.)
Most people would spell it sixteen-year-old child. But over the last 20 years, people are ignoring the hyphens.
No, you should not.
Yes, when used as an adjective. Year-to-year is hyphenated when used as an adjective: year-to-year comparison, year-to-year budget. Year to year is not hyphenated when it is used as a time period: We come back to this same beach year to year.
Both of them should be.
no where 10 year old should not date