I have a car which sounds like it fits your description - not sure on the price brand-new though.
I bought a used Toyota Lucida, (Japanese import - known in the UK as the Previa) which is a 7/8 seater and has plenty of room but is, surprisingly, not so wide that you'd find it a problem driving along narrow lanes - living in Cornwall gives me quite a bit of experience with that!
Mine is a diesel and an automatic and is pretty good with the ole fuel consumption.
Having said all that - I'm no expert when it comes to cars but I thought I'd give you something to start with.