75PS Twingo (2004) roars (and something else)

Hello, I recently had a 75hp Twingo 2004 with about 60tkm. Is that normal, that the engine sounds so kernely, that it starts to roar so loud from about speed 90 so that it gets uncomfortable? Highway driving is stress, I get headache. Or does this indicate a defect? Then I got a new clutch. Is that normal, that when starting up the engine, the engine dies off every second time, if I don’t give up quite a bit of gas? (at my clutch handling li egts really not, am not a beginner) And last not least, sporadically, the airbag lamp lights up. Is that a disease or can you say something? I have a contract workshop appointment next week and it would be nice if I could make them a little steam (especially the clutch).The Twingo is, however, a cheap car, but the last car with such a … Coupling I drove 20 years ago (was a Fiat Uno)… Thank you! Korbinian