What are those phone systems called the ones that ask "Press 1 for blah blah blah." ?

Question

And if anybody has any information on how to set one up that would be nice (although i figure i have to go out and buy one.)

Answer 1

A PBX switch.

If you have an old computer and a few modems, then you can just use Asterix

Answer 2

automated attendant.

any electronic key service unit with an add on automated attendant will do exactly what you need.

I happen to like the Panasonic KX TA624, the automated attendant is an add on board as is the DSS, but you are not stuck with expensive propriatry phones.