As someone who is on some interview dockets for applicants to our department at work I can agree dead on with PADPM, unless you are applying for investment banking or top tier law firm you are fine with a decent suit from a department store. You just want to look neat and organized so your interviewer that reflects your personality. If you dress like you could be on the cover of GQ it will help, but by no means will it make up for a bad interview.
As for questions expect
1. Why Podiatry 3. Tell me about your undergrad/research/current job
2. Why this school 4. What is your biggest weakness/strenght
5. why low gpa or MCAT (if applicable)
I will say that interview feedback page on this site is quite accurate
Western is huge into situational questions, get a book on how to interview for a job and a lot of questions that will be shown in that book will be in westerns question docket
Also have questions of your own. I understand in the era of google it is easy to get a lot of info, but be sure to ask something. Suggestions are, what are you looking for in an ideal candidate, what is your research, what other programs do students get involved with.
Even if you know the answer just ask a few questions.
Finally just relax, unless you have some really big red flags most interviews are not that bad.