I have no idea how using TS could be related to getting hacked in sro. Probably pure nonsense.
All you need is a soundcard and a headset. You can download the TS client on
http://www.goteamspeak.com/
After you've installed/configured it, all you need is a TS server to connect on. There are plenty of public server available (you'll find a list in the client itself).
On a side note, you're always welcome to use my TS server. Just pm me if you're interested. I can setup a separate channel for your guild if you like.