Here is a link to what the script should look like:
I would encourage you to use a voice to text app so you can create the script as you practice talking.
You will do two versions - the initial draft and the final version.
The main thing about the script is that it has to be done. Use it to help you do a better job on creating/delivering your Ted Talk.
How to find the Transcripts for the TED Talks https://www.quora.com/Is-there-any-resource-for-transcripts-and-possibly-image-stills-of-TED-talks