Sandbox Questions

Ok- I am trying to set my account up like Etsy- I received info from the developer in the middle of the night:

I need to know where/how do I get the sandbox

Application ID

Api username

Api Password

Signature

I did get one for my real paypal account, do I use those codes to test or is it something different?

PayPal doesn’t have anyone in the office today to help with sandbox. Grrr….I have been working on this PayPal for 2 days!!!

I need to move on to the next step. Please help. I know you have so many people to help. I truly appreciate all of your help.