•Frugal" isn't a word we use that often anymore, since most of you probably don't remember the old-school Eighties cooking show The Frugal Gourmet. Basically, it just means "inexpensive," or "affordable."
• Similarly, we don't go around bragging about our new "Chariots" to our friends – instead, we call them "cars." (Well, technically, a chariot is drawn by a horse, but you get the point.) So, just replace these old-fashioned words, and the meaning of these lines becomes clearer right away: dude, the car that can carry the human soul around is dirt cheap!