There is no shortcut or tool to use if you want an organic traffic or you want your site to have a good serp position. The only thing to do is to build more links on your site.

There are lots of tools online that you can use to recover your deleted files. Just search for a keyword "free file recovery" tool.

This could still help a little.

On my blog, I only used adsense and it gives me a good income. The key here is the traffic.