This is like mugging, people should sue!
What they're charging for Mineral Oil is even higher than the market price of Synthetic Oil. But I would recommend sticking to Semi-synth or Synth oil, for the sake of your car.
Gearbox Oil and Coolant again heavily overcharged.
Also, the change interval for Gearbox Oil and Coolant should be 1.5-2 times as long as the interval for Engine Oil.
Brake fluid should never be refilled. It is normal for the level to drop as the pads get worn down. The level shown in the reservoir is a way for you to know how worn out the pads are at a glance. When it reaches the minimum you should change any worn out pads/shoes, refill the fluid and bleed the brakes.
AC Filter, AC Blowing Test, Silencer coating, Brake service and consumables are just ways for the showroom to empty your wallet.
As many other members have suggested, change the place you are getting it serviced. Also, if possible, buy any fluids you want changed yourself. This way you get much higher quality for much lower price!
5W40 would be much better.
"S_" grades apply only to petrol engines (The 'S' standing for Spark Ignition). For diesel engines we use "C_" grades ('C' for Compression Ignition).
The appropriate grade would be CF or higher.