I had a renault cleo (with back doors) and I managed ok with it, 3 small children, but we have another car - big estate. Boot space pretty good for a small car, big pushchair and shopping squished in (once rear parcel shelf removed).
You are going to need to put 3 car seats in your car for quite a while. So it seems like a bigger car would make life easier. Maybe Astra/Focus sized? Definitely one with rear doors, will make life so much easier. If it's just going to do mainly short journeys a small engine will keep petrol costs down.
Sorry you haven't received any responses so far. Sounds like you've got a lot on your plate but if you could just let us know how much money you have to spend on your car and, perhaps, whether you have a preference for new vs used, then I expect the answers will start flowing.
can anyone recomend a good family car i have a one year old and twin newborns i have never had a car before and dnt have a clue about them also can any recomend a cae insurance company for a first time drive am worried i wont be able to get insurance for a family car as it will be my first car any help would be much apreciated thanks