It's used in various settings, with different meanings.
Your example is a fairly uncommon case; it means "If you can get him to agree, I will support you wholeheartedly." We don't usually use the phrase in such a serious manner.
More commonly, it's used when people are making social/entertainment plans; in that case, it means "I'm ready / I'm not busy (or don't have other plans) at the moment / your suggestion sounds good to me":
"Are you ready to go?" "I'm all yours."
"Bob, do you have a minute to go over the sales numbers?" "I'm all yours."
"Want to meet for drinks after work?" "I'm all yours."
If you're not familiar with the idiom, this phrase can sound a lot more meaningful than it's usually meant to be - be careful not to read too much into it!
Phrases starting with "Fight through the/it", are telling the subject to stay strong and bear whatever trouble or pain they are enduring.
Fight through the pain - means to struggle onward with whatever is being suffered, despite the pain.
You can use other words than pain for other difficulties. Occasionally it can be seen with the word bureaucracy, to mean getting past all the obstacles that an infrastructure, forms and procedure put in the way of a goal.
means "This example should be understood by you" or "You should immediately understand this." It's possible that's what the writer meant, but if so, the writer hasn't phrased the sentence well. It's unlikely an informed native speaker would say such a thing with such a meaning.
The fact that ngrams for strike home for you shows no usage of the phrase reinforces how unlikely it is to occur, regardless of meaning; but note that the sentence could arise naturally in dialog like
Here's another good anecdote to include in your speech. This example ought to strike home for you.
In this case, someone is telling you that including a certain anecdote in a speech will serve well to get your message across to the audience.
Best Answer
It's used in various settings, with different meanings.
Your example is a fairly uncommon case; it means "If you can get him to agree, I will support you wholeheartedly." We don't usually use the phrase in such a serious manner.
More commonly, it's used when people are making social/entertainment plans; in that case, it means "I'm ready / I'm not busy (or don't have other plans) at the moment / your suggestion sounds good to me":
"Are you ready to go?" "I'm all yours."
"Bob, do you have a minute to go over the sales numbers?" "I'm all yours."
"Want to meet for drinks after work?" "I'm all yours."
If you're not familiar with the idiom, this phrase can sound a lot more meaningful than it's usually meant to be - be careful not to read too much into it!