When/how far away is the interview?
You NEED a suit.
Don't try to "dress up" a shirt and tie with a tie clip! Even if you have a suit, DON'T wear a tie clip.
A new watch isn't needed.
Polished shoes are a given.
You need a blue/grey suit. White shirt. Black shoes. Conservative tie. Clean nails. Haircut and shave. Breath mint(finish before the interview.)
Unless the interview is tomorrow, you have 4 days(including today) to get something by Monday.
Do you have somewhere...