tomato flowers dropping
by vic
(victoria)
Doug says that the flower drop is stress. Likely a watering problem (very likely too much and/or too little) If you're trying to grow in plastic containers, then watering is critical to success and if those containers are too small - you're just never going to get good tomatoes (a minimum of 6 full shovels of soil is necessary and you have to water every day with this minimum)
Curled leaves could be a wide range of problems from the watering to verticillim/fusarium problems.
Let me suggest you get the watering right first and read the tomato growing sections here You'll be able to keep the plants healthier and more likely to see success.