Coolant/antifreeze help

[Supercharged Vipermad]

Being the NON mech that I am I need to ask a question. I am in the process of "burping" my 96 RT/10 and noticed that the collant coming out of the surge (closet to the motor) is DIRTY...I mean it looks green but there are MANY specs of stuff in it. I don't know if the previous owner fulshed out the system???Should I have that done now or is this normal. If I should have it done, is it something I could do myself or should I take her in and finally if I can do it how do I go about it?

Thanks in advance for the help

ScottP