To my mind, Skodas are miles better value.
I used to have a top-end 02 Octavia Estate TDI with extras. It cost £15K new. I was getting my lunch at a supermarket when the driver of an Audi estate (belonging to the local Audi dealer) parked next to me remarked that if my car had an Audi badge on the front, it would cost nearly twice as much!
We bought a Honda FR-V in 2009. 3+3 layout which was great then and for a few years after. But now, the seating is a bit cramped in the front middle seat for a leggy teenager.
Go for as big a car as you can afford.
If you live in a place badly affected by ice and snow in winter, consider 4 x 4.
We have done 115K in the Honda since the beginning of December 2009, so our choice of diesel was justified. Probs better with petrol @ 6K pa.
Don't know your budget, but I would go for a Superb if you can afford it. Hatch or estate, they have limo legroom in the rear and a massive boot.
I wouldn't worry too much about mileage, as long as the car has a FSH. I mean, plan how many years you are going to keep it. Multiply that by 6K. 5 years? 30K, added to a 50K car: 80K, still not excessively high these days.
All the cars bar 2 I ever owned went round the clock and then some. One went 2+ times round and another 160K. One I bought was a Montego TDI estate with a Perkins engine, a bit agricultural, but tough as old boots. I bought it at 100, sold it at 180K. The engine went on to give good service in a long boat.
A 14 plate Superb TDI Greenline Estate with 45K is around £10K.
https://www.autotrader.co.uk/classified/advert/201710270702647?model=SUPERB&radius=1500&advertising-location=at_cars&make=SKODA&postcode=wv113ba&sort=sponsored&maximum-mileage=50000&price-from=500&onesearchad=Used&onesearchad=Nearly New&onesearchad=New&page=1
If you need 4 x 4, Yeti with 34K is good at £7.5K:
https://www.autotrader.co.uk/classified/advert/201708258670138?make=SKODA&radius=1500&drivetrain=Four Wheel Drive&maximum-mileage=50000&price-from=500&sort=price-asc&model=YETI&advertising-location=at_cars&onesearchad=Used&onesearchad=Nearly New&onesearchad=New&postcode=wv113ba&page=1
Or diesel 4 x 4 Octavia with 32K at £8K:
https://www.autotrader.co.uk/classified/advert/201711251580804?sort=price-asc&radius=1500&postcode=wv113ba&maximum-mileage=50000&drivetrain=Four Wheel Drive&make=SKODA&onesearchad=Used&onesearchad=Nearly New&onesearchad=New&advertising-location=at_cars&model=OCTAVIA&price-from=500&page=1
Cheaper Octavia with 34K at 4.5K:
https://www.autotrader.co.uk/classified/advert/201712132021686?sort=price-asc&radius=1500&postcode=wv113ba&maximum-mileage=50000&drivetrain=Front Wheel Drive&make=SKODA&onesearchad=Used&onesearchad=Nearly New&onesearchad=New&advertising-location=at_cars&model=OCTAVIA&price-from=500&page=1