First thing you need to do is decide upon a voltage. If you ordered white or warm white LED's then they want a 3.2 volt power supply.
If that is the case, you can use two AA batteries to power them and you will not need resistors at all. Just wire everything up in parallel. In other words, the positive ends of every LED should be wired together, and the negative ends of every LED should be wired together.
Add a switch, and put the positive ends of the LED's to the positive end of the battery case, the negative ends of the LED's to the negative end of the battery case.
Any other questions, just post.