Need some advice on how to dress for a job interview

I need to buy clothes for a job interview, but I don’t know exactly what to get. It is for a position in a research lab. I want to know what kind of suit to get, and also which dress shoes, socks, dress shirt, and tie.

Also, can you recommend me a briefcase (one that is leather and has a strap) and a portfolio (that I can keep my notebook and pen in)? I’m looking for something affordable.

I’d also like to know which color and design to get for all these things, and where I can find them.

I know that's a lot of detail, but I just want to make sure I don't give a bad first impression because of what I'm wearing.

Thanks.

Jam it back in, in the dark.

What's wrong with getting a black suit?

Also, what color dress shirt should I wear? I see a lot of people in ads wearing light blue dress shirts. And as for the tie, what color or pattern would you recommend?

There's nowhere I can't reach.

So I'm planning to buy a charcoal (it's a very dark gray color) suit, dark blue dress shirt, and black tie. Is that a good choice?

Should I get a 2 button or 3 button suit?

This thing is sticky, and I don't like it. I don't appreciate it.