A good "brick and mortar" TA (like ours) or a good online TA, who is a cruise specialist, will tell you the total cost-fares, taxes, port charges, and tips. While you definately should read the fine print in the ads, a good TA will tell you the cost of everything as soon as you call or visit.
If they are advertising cruises or airfares that don't exist, I'd be calling the BBB and the State's Atty. Generals office to report them.
If they don't give you the full cost, I suggest you change TA's ASAP.