Ok, firstly, if im right in thinking the engine is similar if not the same as that in the idea and the stilo then you are looking at around a 10bhp gain for around the £200 mark. Now this doesnt sound much when you compare it to the 1.9 which gains 40bhp but that is the difference i mentioned earlier. If you were to pair the re-map with a good induction kit like a gsr then the gains would be better.
With regard to a turbo, yes you could do it. As to whether you could strap on the turbo that will be used in the abarth would entirely depend on whether they use the same base and highly tune the turbo. I cant see this being the case as it would need to go from 95bhp to potentially 200+bhp.
Final word, if you are looking at a turbo conversion remember there are other things you need to take into account. Its all good and well having plenty of power but remember you have got to stop it also.
Rich