If you search Ceed Turbo on youtube you'll see 2 that have suffered turbo conversions. If I'm not mistaken they are 2.0 and a 1.6 engines.
It is possible, and if you use 0.6-0.7bar of boost you won't (probably) have to do anything to the internals and have a ~40% power gains.
I'd say... to do that conversion here in Portugal, it would cost you around 2000-2500€ (turbo, piping, Intercooler, ECU remap,...)
As for the peripherals (tyres, suspension, so on), the stock one's are ok, specially if you already have 17" wheels. The 2.0Petrol and diesel engines are the most powerful, and they use exactly the suspension, brakes, etc as the least powerful version of the Ceed.