This is correct for the Greek pronunciation, though "re" should be read with a short "e", which is impossible in English, so "ray" is more accurate. The English is /taɪˈriːsiəs/, as above, I guess.
Isn't /taɪ/ supposed to sound like tie and /ti/ like tea? And the short e would be /ɛ/, as in check, bet or ten? Perhaps I'm missing something, my English pronunciation is pretty inconsistent.
Yes, that is exactly right. The IPA was meant to be how it's pronounced in English, the phonetic is how it's pronounced in Greek, except the e is as you say.
Tea-ray-SEA-ass