Metal Sludge Gossip Board

Long story short, before I get shit all over in the responses, I would like to start my own podcast. I want it to sound as polished as possible while hopefully keeping the spending down as I do not have much to spend in terms of getting it up and running. Is it possible? Do I buy a separate mic, or can I just use my laptop? Not very tech savvy. Thank you for any real help.
Keep Rockin( w/Don Dokken)

You can buy a decent mic for around 100 to hook up to your laptop.