Going from memory here, so all information may not be accurate.
From the All-Stars, the Mears shuttle is about $14 per person round trip, but only picks up at 7, 8, 9, and 10 am, but will return more often (30 min. intervals I think). I think it's probally the same price for all resorts.
A taxi from the All-Stars is about $35 one way, but will pay for 7 passengers in a van. AKL might be a little more, Coronado a little less, and the other resorts even less than that. You could always take the bus to DTD and then cab it from there for the cheapest route.