quantifier

「イスラム国」の発表によると、建国からの３年間にリリースされたメディアは音声メッセージ１６７０本、ビデオ２８８０本、テキスト４５４０本、フォトリポート３２１４０本の合計４万１２３０本です。 本が細く長いものを指すのじゃないか？ なぜここで本を使いますか？

Hello, I am beginner at Japanese, I uploaded a photo in a website and called "three beautiful cities" and translated it into Japanese as "三つの美しい都市よ". My comment was commented as false by a non-native. I am lost. I did not want to argue on that website. Was my sentence really false? Thanks. Enco.

Hi, I have a big doubt regarding this phrase. Unfortunately, I have no context to provide, as it is an isolated phrase from my textbook. It is rather simple, and I already know what it means, though, so it shouldn't be a problem. 道のどこを渡ってもいいですか。 Is it O.K. to cross the road at any place? Now...

Hi, Do you need to use particles with words like 誰か、誰も、何か、何も？ For example, are these sentences correct? 何か食べた。 誰か来ますか。 誰かが私にケーキをくれました。 田中さんは私に何かくれた。 誰かが私に何かを送りました。 よろしくお願いします！

Hi. Another example from Rosetta Stone. 8 eggs. Is this simply two different ways to say the same thing?

I often have trouble deciding where to put words such as たくさん　and 何人も... I am afraid that it may be misunderstood depending on where I place the word. How can I make it clear to what I am referring when using these kind of words? For example: 学生は教科書をたくさん買わなくちゃ I would use the above sentence...