Alles was vorgeschrieben ist, ist Scheisse... HA-HA
Depends on the dialect, mein Herr.
Sch= shhhh. Steyr= Sh-tay-uhr. The "uhr" on the end being a very soft "ER" sound. As there isn't a hard "ERRR" sound in German.
Can also be said as Sh-tye-uhr, depending on dialect. I'd go with the top first.
Koch, is "cook" in German as previously mentioned. And is somewhat like Coke, but "Coke" has two hard "K" sounds. Koch, only has one, the beginning 'K'. The rest is like a drawn out sound of "cH" -not like "ch" in Cheese, which is more of a 'cshhh' sound.
If this is confusing... you hear it one time you'll know what I mean. Now if you want to stump a German, get them to say "the"... 'th' can't be done!