Anser 1=http://linuxlinks.com/Docs/

answer 2= c/c++ vb or c* http://www.cprogramming.com

yes it is possible umm it depends on how you do it it various u can got into a person pc in a intemdiate way or begginer or medium way depends on how good you are bypassing firewalls and stuff i would reccomend this for later on learn what you can now then come back to this