Airport into town $7US, Hire an aircon car, about $10US a day, the driver will find you. I stay with the one who picked me up at the Airport, his name Nah, he very good. I went every where with him and I mean everywhere!! Temple visits 20US for 1 day, $40US for three day pass, your driver will take you everywhere. Bring passport photos for your temple pass. Enclosed vehicle is a great idea because of dust and heat. the temple sites are kilos apart rely on your driver to know where he is going, after 2 and a bit days of temples Nah and myself finished up sitting in a hammuck cafe drinking beer, I was templed out.

An air con Camry usually costs 20- 25USD, a tuktuk 10- 12USD, a mototaxi 8- 10USD.
If you decide to go to the outlying sites, e.g. Beng Melea, Kbal Spean or Phnom Kulen it will cost more.
No need for a passport photo to get the multi- day passes, they'll take your pic at the gateway with a webcam.

As there are 7 of you, you would probably need at least 3 tuk tuks - most take 2 westeners, some 4. Naturally if you were a local you could fit several families.
You might find it easier to hire a mini van - around 30$ -35$ per day
Well, I think WeiLong is stronger than I am. I've seen some pretty tired/hot looking people pedaling along on the way back Angkor to SR. Maybe now that I'm exercising (today 3 miles uphill/downhill in one hour with about a 40# pack) it would be reasonable. Ahhh, but then there is the comfort of the old tuk-tuk - cool wind on your face, wind ruffling your fur, chugging a bottle of warmish water - it don't get much finer than this!
bun cha

you can fit three in the tuk tuk comfortably...any more is a bit of a squash....you can also use motorcycles to get around. our guesthouse rented motorcycles out and they also had drivers to take you into town and back.

Guys,
Really appreciate all your help and advice. it is not as bad as I guess.
Just confirm my flight for 8 pax. So either 4 tuk tuk or a mini van or 2 moto .....
Anyone got any contact no for Villa Siem Reap. I send them an email but no reply... call them the no seem invalid.
I will post my iterinary later once I get to know more about Angkor Wat.
Cheers
Daniel