Is it possible to put a tubo/supercharger onto a 1.8 (125) petrol?

If yes:
[*]How easy is this to install?
[*]how much would it cost to get the parts?
[*]would you need to remap the engine management system?
[*]How much would it save you in fuel costs and would it increase your fuel economy?
Many thanks and hope you can answer my questions