Family combi up to 1500€ max. 50000km

Dear community, we are looking for a new car for our small family (pair + 1 child (5 months)) and it is to become a combo. As in the title read: max. 1500€ and max. 50000 km mileage. In the narrower selection came so far or come: Seat Leon ST (1.4 TSI) Skoda Octavia VW Golf Vll Variant On size etc. I have already checked it. Octavia = Wonder of Space, Leon = Sporty, Golf = Allround Bzgl of these three: Are there versions (motorizations), which you recommend and/or completely out a diesel is out of the question for us. Which other (compact) Kombis could still be in question or not at all in question?! Thank you for your answers, simply post questions, try to answer quickly and concretely.