Nothing easier than that! At Zurich airport, go down the stairs, get your ticket at one of several ticket booths and take the S2 line to "Enge" station. The trip takes roughly half an hour (delays included...). Or take any train to Zurich main station ("Hauptbahnhof"), there change to another train or to the tram/street car to "Enge". A single journey ticket costs Sfr. 6.20, a return ticket is valid 24 hours and can be used for as many trips as you wish within the city boundaries and costs Sfr. 12.40. The hotel is just across from "Enge" station (
http://maps.google.ch/maps?source=ig&hl=… ).
For a personalized schedule, try one of these sites:
http://www.zvv.ch/en/ and
http://www.sbb.ch/en/index.htm.
I agree, don't spend your money on the taxi - they are the second most expensive ones in the whole world (after Geneva).