Questions on application - Int. Student

I am a German student. I will be applying for Mathematics at the top unis next year.
Therefore, I have a few question about how to prepare for the interview, STEP and so on.

1. I would like to go through A-Level Maths and Further Maths so that I can get used to the language, as well as compare it with the material I study in Germany. Which books would you suggest me to use for... ? Would you say it is useful to go through A-level material or should I just familiarize myself with the mathematical language?

2. What is the best way to prepare for the STEP in my situation. Is there any particular aspect I have to put special emphasis on?

3. Despite A-level Maths and Further Maths, what do I have to know for Oxbridge interviews?

Thank you in advance.

Sven

Thank you for your quick reply rikkuhitsu .
The problem is that we are using only one book in germany for the last 2 years before graduating. It is hard to say whether the exams are similar, because you are using so many different books for every typ of mathematics. Nevertheless I suspect that the material is quite the same. Due to this difference I thought about going through some books to check the deviation.
You listed some books, do you thing it is necessary to cope with all of them or only with the C1 and C2 ?

Sven