1. (I don't what's the context)
2. No, I don't.
3. (I don't know when did you start, I'll write when I started studying English at school)
I started studying English in the third grade.
4. (Again, I don't know the context to answer this question. If these questions based on a text, why didn't you posted it too?)
5. How often do I see whom?
6. (Again, I don't know the context to answer this question)
7. (I'll write this on random) We met at a café