Sedona is a town, not a park with one gate, so there is no single ticket. What you pay for depends on how you spend the day: a Red Rock Pass to park at the trailheads of the Coconino National Forest, a separate fee at the creekside picnic sites and the state parks, a jeep tour onto the backcountry roads, an evening stargazing tour, the Verde Canyon Railroad from Clarkdale, or a full day tour from Phoenix that handles the driving.
Which ones make sense depends on whether you have a car, how much hiking you plan, and how many days you have. These pages compare them plainly and point out the parking rules that catch first-time visitors.