Expenses include car registration, fuel, maintenance, insurance, parking etc.
For comparison, a daily Zone 1 + 2 full-fare Myki (Victoria) transport fee is $7.52 per weekday.
For Myki money, let's say you use it each day of the week for a whole year: 52 weeks * 5 week days per week = 260 week days a year * $7.52 = Yearly Myki fares of $1955.20
For Myki pass, the equivalent of the above is a much lower $1501.50 per year
I'd do a poll but some people use their cars often while some don't use their cars at all so it might be an apples and oranges comparison. But if you want to, I'll add the poll upon request ($0-$99, $100-$199 etc).
Rego + CTP = $1,200
Petrol = $25 x 52 = $1,300
Maintenance = $400
Comprehensive car insurance = $1,100
Opal yearly = $38 x 52 = $1,976
Parking = $0
Total = $5,976