to make this very short
Q: Why learn arabic? and how much?
A: (for the most part) enough to understand the quran and hadiths
2 best ways to satisify the the answer are:
"Quraanic lessons" and "Quran understanding the easy way"
inshallah i will add more to this thread later on. if anyone else can add links, it would be helpful.
And quranic arabic should be made a sticky in islamic education