To the OP:
If you are driving from Georgia on I-75, there are no tolls on the interstate. There are tolls on the Florida Turnpike, which is what most people will take from the Turnpike to the Orlando area. You can go to the floridasturnpike website for a toll calculator to find out exactly how much you will pay. If you want to avoid tolls, you can get off of the Turnpike at Hwy 301 (before the first toll booth), take Hwy 301 to Hwy 50, Hwy 50 to Hwy 27, Hwy 27 to Hwy 192, or you can take I-75 to I-4, and I-4 east to Orlando. But either of these routes will take you out of your way and cost you time.
Most Disney guests prefer to take the new Western Beltway (SR429) exit off the Turnpike to Disney instead of taking the Turnpike all the way to I-4, and then I-4 to Disney. The Western Beltway is also a toll road, and you can look up the tolls on the same website.
Just for the record, the E-Pass and SunPass transponders are a PRE-paid system. Anyone who is a frequent visitor to Orlando can buy a transponder and set up an account. Prepaid accounts do qualify for discounts on some routes, but not all. The only time a photo of the car's license plate is taken is if the car goes through a collection gate with either no transponder or with no money in their account. They are not mailed a bill - they are mailed a traffic citation! I have one of the transponders, because I use the Turnpike to go to work.