4 hours should be enough time to allow. The tolls must have come to about $15 I think. There was one fairly long stretch that you get a ticket one end (instead of handing over your money as usual) and depending where you exit, your fee is calculated when you hand the ticket back. If you're going all the way through one that cost is just over $10, there are a couple of other smaller tolls to pay on the turnpike and then another couple on the Osceola Parkway if you take that road into Disney.