Can you do two co curricular activities? Can you tell us more about how they are run?
Cheers!
Depending on what co-curricular you pick, you may have to change every Term since they only run for certain periods of time (E.g Sport runs per Term whilst Drawing may run for a Semester for example).
Undeadset15 has pretty much got it right where it runs from 1:30pm - 3:30pm and that's about it really... I'd wait till Info Night before you ask any more about it though since Info Night will answer most questions officially so it's best to wait till then I guess (same goes for the laptop question).
In regards to start of school, wait till it officially arrives but I believe Year 10's start on the Wednesday actually (that is January 28).