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No, Counter-Strike: Source is a one-time fee.
If you want to play online against other players yes, but you can play offline against bots.
Download steam from steampowered.com and search for counter-strike source
yes you can
no
You need to have counter strike source installed to play trouble in terrorist town.
Download Counter Strike Source. Play Counter Strike Source. Delete Counter Strike 1.6 It's 2012 for christ sakes.
I use windows 7 and I play source fine.
http://www.shantanutushar.com/content/how-play-multiplayer-half-life-counter-strike-over-internet
There is no Counter Strike 2.0, but i think Valves new game Counter Strike Source would count. New graphics, maps and stuff like that. It's run on the source engine. What you do is download a program called steam, find the steam store, find counter strike: source there, buy it and it will download. Then you can play :D
no
Play on the map scoutzknifez and you'll get better.