No real discounted tickets unless you want to listen to timeshare sales pitches. AAA has slightly discounted tickets if you buy 4 day park hopper.
4 Day park hopper is your best deal (unless you want annual pass). I recommend taking advantage of all the great restaurants. If you just want to go to Disney, don't get a car. The extra to staying on property is still probably better than paying for a car. Rte 192 in Kissimmee can be a turn off. Only go down there if you are really looking for discounted motels.
Let me know if you have specific questions.