It is often enough to just capitalise the first letter in each word, not every single letter.
Yes.
Yes.
No, the word lunch is not capitalized in a sentence. You would only capitalize it if it was part of a title (e.g. it was a word in a book title).
If it is the first word in the title, yes.
Yes, you should capitalize "About" in a title.
If its the title, 'on' can be capitalized to put emphasis. Else, there no such rule to capitalize it.
To write the title of a book in APA format, capitalize the first letter of the title, subtitle, and any proper nouns. Italicize the title and subtitle, and use sentence case for the title.
To write a book title in APA format, you should capitalize the first letter of the title, subtitle, and any proper nouns. Italicize the title and subtitle, and use sentence case for the title.
You don't, unless it is at the start of a sentence, or is part of a title or subtotal on a document or a book.
To cite a book title in APA format, you should italicize the title and capitalize the first letter of the first word, the first word after a colon, and proper nouns.
Capitalize the word "The".
no