1998 S40 2.0 air condition...

Hi! My volvo is 2.0. I don't know is it injection. His power is 103kw about 138ph. I have a few questions about this car.
1. How does air condition works. I don't know what is airmix and how it works. How can I turn off air condition? When it is on windshield ac button is always on. When I turn it to legs for example it turnes off. When it is on windshield the button for circulating air in cabin is off, again, when it is moved it turnes on.
2. How to find out is my model injection?
3. How to find out which is this model. It is petrol, 2.0, 16v, 103kw, it has ac, abs, el. mirrors, el. windows, cd with cassete, 6 speakers, el. driving seat, srs airbag for driver...
4. How to find out does it have airbag for codriver and rear passengers?
5. Is it normal to get only one key for this volvo? Can it be copied? Is it a code key?
...

The major question is about this air condition. Can someone explain me how to use this, or tell me where to download user manual for this car? It must be on English or Croatian language because I'm from Serbia and I only understand those two lang. I have user manual on Italian but I cant understand it.
Thanks

p.s. sorry on my poor english