Hello,
About transportation: there is no train, nor tram in Malta (due to the size of the island). Only public transport is the bus. Honestly I have never taken it but I've heard that single ticket is about 2 euro and it's valid for few hours, there is the monthly card option though which allows to save a good bunch of euros , especially to those whom use it frequently.
Taxi: there is plenty of competition, many taci companies with cars with diffetent colours ( yellow, white, black);I personally suggest to book online the black taxi ( google > ecabs malta ) in advance, they have fix prices and there are reliable. I DON'T suggest to get on any white taxi you find around the island. Expensive and they drive like crazy. Traffic at certain time of the day is unbearable ( Malta has the highest density of cars per family in Europe) especially during summer or when it rains... parking is another hard challenging matter...
Fuel: unleaded gasoline at the moment is 1,31 euro per litre ( it is pretty stable, in fact it hasn't changed in the past 18 months). The price is fixed.
Electricity and water: this is a tricky one.
It depends on if your landlord registered it as residential or not residential. The difference is pretty relevant considering that if you are on residential tariff you averagely pay about half price per year compared to the "non residential" one so ALWAYS ask your landlord the form H for residential tariff once you get the e-residence card and the number of people living in the property.
Mind that the houses in Malta are pretty humid so , despite the temperature in winter doesn't normally drop below 10 c° , due to the high humidity and bad isolation of the buildings, you will feel like It's 2 c°.. the summer it's super hot...ADVICE: most of the houses are equipped with AC... USE IT WISELY or your bill will kill you...
For cooking, the majority of the houses use gas tank which is pretty cheap ( 1 gas tank lasts 3 or 4 months and it costs about 15 euro)
Last but not least, renting.
This is a big one. In the last couple of years the price rocketed. It depends on the area where you want to live but , be assure that wherever it may be, it is now double price than few years ago. In Marsascala for instance, the same 2 bedrooms apartment which was 500 euro in 2015 for 1 year contract, It's close to 1100 euro now. It the high touristic areas like St.Julians, sliema or St. Paul Bay... with 500/600 euro you can afford to rent a room... the market is not regulated and It's become crazy...
Ok enough for now.
Keep well everyone
Cheers from Malta