Whose temple was before the city (tou ontos pro tēs pōleōs). The god (Zeus) is identified with his temple. He had a statue and temple there.
Oxen and garlands (taurous kai stemmata). Probably garlands to put on the oxen before they were slain. It was common to sacrifice bullocks to Jupiter and Mercury.
Would have done sacrifice (ēthelen thuein). Imperfect indicative, wanted to offer sacrifice. He was planning to do it, and his purpose now became plain to Paul and Barnabas.