Well first off housing is really brutal here - the cheapest room in a government housing building in a residential neighbourhood (read: anywhere from 40 minutes to 1.5 hours from the main city area) will set you back something like S$800 - 1000 monthly, but that honestly is less than ideal. For a space like that you're looking at living with a family, not being allowed to have friends over, and the flat may have like 4 rooms? But for $1000-$1500 you can get a single room in a
condominium, or in a place or location you might actually enjoy. For $2000 - $3000 you can get a whole government housing apartment to yourself, or a smaller
condo. And that covers just about the spectrum of housing considerations.
Groceries, household goods, eating out (except in hawker centres) and especially drinking - these are expensive here, at least in comparison with America and um, most of the world. Coming from UK though, given the exchange rate, it might not be so bad; my friends from London don't mind because it's apparently pretty comfortable for them, cost-of-living-wise, at least in comparison. But I mean, living in New York was so, so much cheaper than being here, so I'll always be pretty sore about that. Transport isn't expensive, at least there's that.
I hope that helps! But generally the wages in Singapore aren't high, the lucky local graduates earn $3k+, if the company's a local one they might not offer you a whole lot.