Amazon will not send to Switzerland in alot of cases. Sometimes they will send to the border town of Germany ( Konstanz ) using packet service of Hermes. Import duties etc can be alot sometimes. Especially buying from UK.
1. Is my wife's 100k CHF offer enough to cover the high cost of living, considering it'll basically be making up for my low salary as well?
Its more than enough if you put your earnings in there. Zürich is NOT exorbitant costly. Things are expensive like Health Insurance and public transport and accommodation but with your wages you are earning far more than alot of others.400 CHF for insurance will not cover dental. Thats extra and for an adult is very very expensive ( and unless you have perfect teeth they will not give insurance for this)
You might be lucky to find a job here without German. Do you have qualifications? Learning German for you and your wife should be number 1 priority.
13. Flights from Zurich appear to be significantly more expensive than flights from London. Is this an accurate impression? Or is it just the time of year that I happen to be looking at?
Use easy jet or air berlin or any other in Europe
Zug a beautiful town. I would not say that. Very very boring.