It depends on the instructions for the task.
If it says"summarise all the points" or something to that effect, then yes, mention all the points.
If it says "mention some of the points", select some of the points you believe to be more relevant/interesting (in your view).
If it says "mention the most relevant points of the (article/text/…)", select the key ideas in the text, not in your view, but objectively, the essential information contained in the text.
If your friend's situation is described in detail, and the task asks you to "select and relay the most salient/relevant points for your friend", then you need to carefully select ONLY those points which are relevant for your friend, and leave other non-relevant points aside.
The bottom line is: read the task carefully and make sure you follow the instructions given.
Literal translation is clearly discouraged. To start with, because literal translation will typically lead you to making mistakes and, on top of that, probably you won't be summarising and paraphrasing/explaining the text clearly, which is what you need to do.
Some translation (if not literal) is likely to occur at some points, and that is understandable. What we mean when we say "steer clear from translating the text", "avoid translating the source text" is that if you simply translate, even if correctly, you are not putting into practice the two main mediation strategies required: summarising and paraphrasing. Google Translate could do that for your friend. You, however, are aware of their needs, and can put in place other strategies and resources.
No, please don't. Adding extra information not contained in the source text will grade you down. I don't think that is likely to happen (at least in advanced levels, where source texts tend to be quite long), so you are likely to have more than enough source material.
Make sure that you have included all the information required by the task. Should you have fulfilled the task and still have some time left, you can always make a longer conclusion. Alternatively, if you have actually fulfilled the task, examiners will probably stop you, if your performance was satisfactory enough (or has at least fulfilled the formal aspects of the task).