just to share some of my experience, after 1 year working in sg.
food:
hawker food is quite affordable, u can get by ur lunch/dinner with $5
restaurant in mall normally range from ~$8 to any price
transport:
u can get to anywhere in sg by public transport - mrt/bus
so no problem with transport actually. just that u need to plan ur time well
if u stay near to ur office , then thats good and u can save alot in transportation.
accommodation:
a common room here (1pax) include utilities&internet normally rental range from $400-$700 for hdb
if condo around $800-1000+
some include aircon which is always good as weather here 80% of the time is hot
misc:
hippie cafe in sg: coffee price around $5-10, big breakfast can range from $10-30+ depending on the area where the cafe is
library in sg: apa book u mau pun ada, can borrow with a small fees
daily necessities: i see some of my fren always go JB to buy shampoo,food,watson,etc. but for me i would not spend the time going out to JB purposely buying shampoo and stuff.
tax: not much rebate like in malaysia
bank: open dbs/posb easiest, as they accept malaysia IC. also most common bank in sg, can find the atm at every corner.
mobile no.: singtel,starhub,m1. imo, starhub is the balance between singtel and m1, m1 is cheap but line not stable, singtel is stable not price higher.
entertainment: in sg, far more expensive than compare in malaysia.
imo: u can save alot $$$ in sg, unless u always go hippie cafe/restaurant, drink alcohol, or go geylang.
food: go pasar food court lo, chicken rice 2.5-3, dai chow 3 can get. when I am very tight I try limited $10 a day. Go air con kopitiam sure have to pay 3.x to 5 a plate/bowl
tax here is much lower ba even without deduction for foreigner. if you convert you save even more.