Driving in Florida is so much easier than in the Uk (in my opinion). I would always book a car just for the convenience and also, I've paid before I go on holiday. Why not book a car for your first week and see how it goes? You could always then decide if you want to go back to taxies.

You don't necessarily need to use the toll roads. We use the odd one just to save time and accept we need to pay for this.

Parking at Disney is I think, $11 per day.