Syllabus:

http://www.upscsyllabus.in/cse/csat-syllabus
http://csat.testbag.com/exam-analysis.php?tp=1

Eligibility:
http://csat.testbag.com/exam-analysis.php?tp=4&eid=CSAT
http://www.civilserviceindia.com/upsc-examination-time-table.html
http://recruitmentresult.com/csat-application-form/
Application process:
http://recruitmentresult.com/csat-application-form/

exam centers:
http://www.civilserviceindia.com/upsc-exam-centers.html
http://iasexamportal.com/civilservices/info/List-Of-Civil-Services-Examination-Centers
salary
http://www.clearias.com/salary-of-an-ias-officer/
https://www.quora.com/What-are-the-salaries-of-IAS-IPS-and-IFS-officers

Structure:
https://en.wikipedia.org/wiki/Civil_Services_of_India#Employment_by_agency
http://www.civilserviceindia.com/civil-services-list.html

250, 409, 250, 400, 501, 295, 150, 454, 216.
86, 91, 91, 93, 80, 90, 95, 81, 98.