Sample questions of the written exam used to circulate, maybe hundred pages of photocopies, but this was some years ago, it was quite helpful.
Also, look for a [blue & yellow?] book at Sterling Book House in downtown Mumbai (I forgot the name of that book but it was also helpful).
Your OPS manager should be able to help you, and ask around, other expat pilots should have some recent hints.
As for the English proficiency, just take the Indian check (or interview), the examiner will give you a piece of paper with a rubber stamped level 5. (If you are former IAF, then you get level 6
)