About 8 years ago (now I feel really old! ) we took Mears from WDW to Universal. I think it was around $9.00, but I can't remember if that was round trip or one way. I am sure they have a web site that you can check the prices. We also used Mears to go to Sea World.
We were staying at POFQ and it was great. We called a few days before and arranged the time and they picked us up out front. Then they drop you off at Universal. We had to call two hours prior to when we wanted to be picked up to go back to the hotel. They told us what time a shuttle would be there and took the name and number of guests in the party. I liked that since we didn't have to figure out how long we wanted to stay in advance, and we were semi-flexible.
That was the last trip to WDW I took before I got married and at since our honeymoon, we have always rented a car.
Sorry I can't help you with a cab, I have never done that.
It is $12 per person round trip. You call the day before to set up your pick up time.
When you are ready to leave you are "supposed" to call them 1-2 hours ahead (but a lot of people just go down to the bus parking lot without doing this).
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