are all lectures recorded and able to watch at home or only some of them? if this is the case will we be told whether the lecture is recorded or not?
Almost all lectures are recorded. The student union (MSA) ran a campaign last year and the year before to convince most of the lecturers to do it, as far as i know though, it's still up to their discretion.
The vast majority are recorded (almost all the recorded ones have video of the lecturers screen/projector output too).
If one is recorded, its almost certain all the rest will be too (barring technical failure, etc).
A provisional list should be here before uni starts -
http://mulo.monash.edu.au/If they were recorded last year, fair bet they will be for this year though. So, you can look at last years list.