2003' Alfa Romeo 147

Hello. For sale alfa Romeo 147 1.6 petrol and gas
The car is sold as damaged because I cannot diagnose it.
Symptoms are 1 liter of something smokes per 1 pot.
In my opinion, the issue of electrics, dome cables.
To be seen in the new steelworks.
It fires but does not run at full power.
It sells as semi-functional