TT Rest API

Hi,
I am new to tt. I need to use the TT Rest API for our application. But i am not getting enough details for this. What I need is,
1. Where should i create developer account for TT Rest API which provides me data?
2. where should i get documentation for TT Rest API?
3. Where should I get sample apllication which explains TT Rest API?

Thanks,
Nilesh