hello, I have three questions!

1. "Vous demandez conseil."
In this sentence, I noticed that there is no article.
don't we use article with the verb demander?

2. I know that there can be a noun after "a peur de",
but how can I say a sentence with "a peur de"?
(eg. I am afraid of being neglected / I am afraid if he is going to leave me.)
and do we put article after "de"?
(is it J'ai peur de chien or J'ai peur des chiens?)

3. "Il ne manquait que toi."
I asked this yesterday, but thanks to a detailed explanation,
It's still hard for me to understand.
Does this mean "You were the only one who is missed"?
Can you explain the grammar?
(does il here mean "it"? or "he"? and why tonic pronoun toi is at the end?
(I thought tonic pronoun should be placed before, such as Il m'ennuie / Ça ne m'étonne...)

Thanks!