Add punctuation: Because you are obliged to insure and register the car in your country of residence you may encounter problems if your insurance is not valid in the country you want to move to
A: Because you are obliged to insure and register the car in your country of residence, you may encounter problems if your insurance is not valid in the country you want to move to.

Add punctuation: Earlier he had worked both with still livesobjects his excellent zoological museum series Les Bestiaiare is also included here and portraiture
A: Earlier he had worked both with still lives/objects, his excellent zoological museum series "Les Bestiaiare" is also included here, and portraiture.

Add punctuation: 3 SKI 96 rounded steel body with external pendulum tailgate
A:
3. S.KI 9.6 rounded steel body with external pendulum tailgate