Hey u can buy 2nd hand textbooks from
www.textbookexchange.com.au its a website for uni students where u can meet up at uni so its really good (PS I've got a few books on there)
And about lab coats and safety glasses u can buy them during O-week. there r stands there that sell all kinds of stuff and last year SUPA also sold them after the lecture(during the free bbq) and they were cheap !! (i got mine for $20 but its plain doesn't have the uni crest). and they also sell them in the newsagencies and other little shops around campus !!!
so goodluck everyone !