If you have already bought hosting at Hostgator, you can sign in there and setup your blog/site if you have not done so. If you have problems, you can use their CHAT facility, or otherwise ask for support. For setting up WP, database etc., read the instructions. If you do not find them, I can post the links for you.
About the advice of rameshhelps, I cannot say anything because I do not understand what he writes, or rather I am a bit confused. So, take your own decision.
And so far, I could not understand what your real problem is because if you bought the domain (from whom) and hosting, you can easily setup your blog. In your first post also, it is not clear as to what you did and what you lost.
Look HERE. Is it NOT misleading? Where do you find Hostgator as you say?