Hello shreeneewas,
Did you say your double buggy won't fit in the boot of an Avensis?! Not even when folded up?
You say your annual mileage is just 2000 per year therefore you need a petrol and not a diesel.

Not sure you will be able to get into a Grand C-Max for £10k yet. The VW Touran will be well within your price range, as will the Vauxhall Zafira (think you got muddled as there is no such car as a VW Zaphira).
I would also look at a Honda FRV - these are a 6 seater car (2rows x 3seats) and later ones come with a 1.8 petrol (with an auto option). Your buggy may not fit however - but worth a try.
At just 2000 miles per year your car is barely going to be used - you don't need to be spending anything like £10k really. Half of that budget would buy Honda Accord 2.0 petrol estate, which has a massive boot and excellent reliability.

Any word on Mazda 5 - petrol auto model ? I am keen to hear some feedback on this car as I have taken a liking for its sliding door.

After passing my test in a small citroen c3, I went straight into a citroen xsara estate, it didn't take long to adust to the length and in your budget, you could afford parking sensors?

My old Citroen was great, but yes there are some that are awful. Parts prices are affected by where you source them from e.g. citroen or ebay/a breakers? Because you are only going to be doing 2000 miles a year roughly, some engines won't like this and anything with a lot of electronics that are charged by a battery it may cause a problem? I don't know what to advise to buy, but whoever you are talking to explain, how little you will be using the car?

I'd also recommend an FRV. It is our "smaller" second MPV. It was the main one till i gone and did it again and number arrived 4 months ago.

All depends on your requirements for luggage. We have a phil and teds buggy...so a double buggy bug longtitudally if you see what i mean. Children sit in a row rather than beside each other. That folded up fits in the boot nicely and allows plenty of room for soft bags for luggage. If you are talking about a double (side by side) buggy i would suggest one of the more traditional mini 7 seaters. We looked at the Verso/Corolla Verso when number 4 arrived by decided against on the grounds that the boot is rubbish if one rear seat is in place. If you will never go beyond 3 kids max then one of these 7 seat MPVs maybe more suitable.

Back in the days of a normal amount of kids (3) i ran a 1.8 petrol avensis estate...little bit gutless on hills but that would be levelled at most 1.8 petrols driving something Avensis or Verso sized.

There really is very little consumption difference wise between most 1.8s and 2.0s at this point in the market. If cost is an issue it might be more insurance/tax wise but fuel difference will be negligible.

As other posters have stated i would stick japanese, Mazda or Toyota. Again we also looked at the Mazda 5 at one point while with 4 kids...but the limiting factor there for us is the middle seat is a tiny perch...it folds out from under/behind the outer seats. So again here if 2 is where you are stopping a great car. If the stork may visit again in a couple of years then it wouldn't be ideal as that middle seat wouldn't take a child seat booster well at all. So in summary to me for reliability your options are as follows. Also i love the sliding doors...our current main MPV (Sedona) has the electric sliding doors. I am pretty sure these are an option on the MAzda if you get a sufficiently high spec. They are brilliantly useful when you are wrestling a couple of kids or where i find them very help during the school run where i do a "drive by drop off" no need for me to get out of the car.....sometimes i even slow down!

Thanks everyone for your wonderful reply.

Honda FRV is a good vehicle ans very spacious but having 3 seats may not be very convinient to me.

@cavey76

Thanks for acknowledging that twins and saloon/hatchback dont go together. We came to same conclusion when we could not fit our buggy and couple fo bags on our way to party. And thats when I started looking elsewhere.

And yes we are going to stop at 2, our home is noisier than railway station ;). And about cramped middle seat in rear row, it seems to be a case with all the compact MPV so that is a comprimise I need to live with.

Between Corrola Verso and Mazda 5, sliding door changes the game altogether. It gives such a easy access for placing children in car seat.

It is stil not a final decision, but I am titling towards Mazda 5 Auto Petrol. I have checked the reviews so far nothing concerning. But please let me know if I need to ne warned of anything.

Thanks

Shrini