yes its possible if it was an elective. but seriously if you learnt all that crap again, it could not possibly be that hard to just study, not turn up to lectures etc and pass it next time
use the uts guidebook to determine whether or not the subjects you wish to do have pre-requisites. you dont have to follow the recommended schedule, however following the schedule is best if you want to meet ppl who are in whatever year of uni you are in + doing the same course as yours
uts is very generous on bonus points. you could possibly get up to 15, if you get the 10 points for eas, along with the 5 points for subject bands. therefore getting into business with 91 cut-off, you could get in with a 76.