The search queries report has just been changed in Google Webmaster tools Google named it Search Analytics (Beta). I saw it today morning IST time, it seems very useful because the bifurcation of data to be analysed there is also option to go back to standard search query report.
Hyper Text Transfer Protocol or HTTP response status codes are returned when search engines or website visitors make a request to a web server. These codes with three digit value indicate the response and status of HTTP requests. The http response starts form 1xx, 2xx, 3xx, 4xx and 5xx for 1xx I suggest you to do some search hear I am explaining you the rest of the http status codes.
Yes you’re reading it correct as per Google webmaster central blog Google has re-branded it with Google Search Console. The idea behind re-branding is there are users using webmaster tools as a hobby, small business owners, freelancers, experts