I just got an iPad air and I tried to buy an app but it wouldn't let me, I don't know what my security question answers are and when I tried to reset my questions, it said it would send it to my rescue email but the email is invalid!! Help! What do I do?

I bought an iPad air yesterday and I was setting it up and i wanted to buy new apps and I was going to buy an app that cost money but when I tried to buy it, a notification popped up and it said that I needed to enter my security question answers but I don't remember them, I've tried many times but have failed, so I went to the apple website that could reset my questions but when i got to the page where it said I could reset my questions, it said it had a rescue email that it could send it to but i have no clue what it is and the email ends in "gmail.cl" so obviously it is am invalid email address, I don't know why that is on their as a rescue email when it doesn't work so I was wondering how to choose a different rescue email!!!!!!! I am very frustrated so please help