Got this data from Analytics. I not been receiving any traffic from Google lately, but still surviving through referring sites..
What was the reason as to getting sandboxed for your site? Generally building back quality backlinks and correcting your mistakes will get you back in the game.
I got sandboxed when I changed my site around and it went higher in the SERPs about a week later. Just build backlinks gradually and it should go away soon hopefully.
My site is almost two years old, but I only activated it a month ago (after being idle for 1 1/2 years). It is hosted in Blogger. I was having high traffic before, then I decided to change my template, and my Blog title. Are these the probable causes?
Yeah, that sounds like a pretty big change. Google simply demotes sites when they change things like that for a little while to keep down search engine manipulation - you'll be back sometime soon if there was no other penalties you tripped.