Is there an adapter for this?

hi, im not very savy with computer terms, so bear with me.

I have an hp Compaq pro 6300 SFF, with its connecting cords for audio, USB, and HDMI all connecting to one plug into the back of the computer. like, three heads connected to one plug. and from what I've seen, no modern monitors have more plugs than just hdmi or vda or whatever it is. so I have two questions;

is there an adapter to connect the cords to, and then that to the monitor? OR, is there a kind of monitor I could get thags like. relatively cheap? the only one I've seen is a $700 all in one monitor at best buy.