Ausbildung Visa Query

Hi Everyone,

I am a South African, that has been offered and accepted an Ausbildung in Germany, I have a few questions/ concerns if you could be of any assistance.

1. My future employer has already gotten approval from ZAV, my next step is to apply for a visa in South Africa. On the diplo.de website it does not stipulate what documents are required for the application. I phoned the consulate and they stated that it would be the same as the employment visa, although there are some documents that I think differ. Can anyone shed some light on the process going forward and/or the documentation required, I have the following ready:

- Original High School Diploma and certified translated document in German
- Deutsches Sprach Diplom - zweite Stufe ( I attended the German school and had all of my classes in German up until Grade 11)
- Original Letter from the ZAV in Köln agreeing to the employment
- Original signed contract from my employer
- Completed visa applications
- Recent Bio-metric pictures

2.  Health Insurance: my current private health insurance covers me for the 1st 3 months in Germany, it is unlimited care and has been previously approved for my Schengen Visa. I called one of the Health Insurance companies in Germany and they stated that I would need a Residence Permit before being able to apply for Health Insurance. Will it suffice that my employer states that I will be covered by the state health insurance as soon as my employment commences? Or do I need to arrange health care by myself and provide the Visa Office with separate documentation.

Thanks and looking forward to the feedback.