My IELTS score is 6 (L-6.5, R-5.5, W-6 and S-6.5). Is it possible to do any course from NZ, especially level 9?

It depends on the programme. English-taught courses may require English proficiency, while German-taught programmes require recognised German-language proof. The exact test and score should be checked on your chosen programme's TUD page.

For most English-taught Master's programmes, TU Darmstadt requires IELTS 7.0, TOEFL iBT 95, or PTE Academic 76 (some specific programmes like Mechanics M.Sc. accept lower scores such as IELTS 5.5, so always confirm on your target programme's page).

It depends on the programme. English-taught courses require proof of English language proficiency.

Just check the admission requirements of the programme first. If it is mentioned that language of study will be English then you need to appear in IELTS.

It is not mandatory to submit German language proficiency score at Munich Business School. But, English language proficiency score has to be submitted. Minimum scores required are-

No, GMAT/GRE scores are not required for any program. Furthermore, many departments waive IELTS if an applicant scored 70%-80% or higher in Class 12 English (CBSE/CISCE boards) and can provide a Medium of Instruction (MOI) letter from their Indian university.