1. Maybe some of the other forum member can chip in here, as I am Based in durban.
2. The front lip and rear boot spoiler make a massive difference. Its definitely the way to go if you plan on making the car look a bit more aggressive. I'm fairly sure you can reach out to the likes of Rennzsport and Carbon Bros for these.
3. This would be dependant on the mileage and past treatment of the vehicle. Based on the age I would assume mileage would be in excess of 100 000 km. I would recommend doing your oil changes every 10 000 km, and sticking religiously to your service schedules. At the current mileage you could possibly have an issue with engine mounts in the near future which is a fairly common wear and tear issue. You might also want to have the gearbox serviced with ZF. If you treat her well you should have no major issues, however this is dependant on how well the car has been cared for in the past.