Not sure when last time the Honda was detailed and 2007 at 175K, need a good carpet shampoo. Detailing by a pro will run $100 + depending on dirt and type of service. Full tilt interior and exterior can be $200 +.
Towel blotting the nasty stains seems to work, start out lest aggressive cleaner and move up to most aggressive. Try and determine the stain type and if an alkaline or acid cleaner is needed. Example. Water, water and detergent, straight distilled vinegar, ammonia, hydrogen peroxide, isopropyl alcohol. http://www.dawnchemical.com/shop/scripts/page.asp?p=_chemistryofcleaning&s=dawnchemical
Using a Hoover Carpet vac with 8-foot hose upholstery wand. Nice unit 12 amp. Cleaner Great value Oxy carpet cleaner (Bissell). A pretreat of 3 parts water, 1 part distilled vinegar, a tablespoon of dawn dish and a pinch of laundry detergent.
Clean out everything, vacuum, and apply the pretreat to any dark spots/areas. Let the pretreat sit 30 mins. Use carpet shampoo system to clean and extract.
The car mats were cleaned in the bathtub. Any leftover old stains may take more work and other cleaning solutions. The last spot and maybe coffee or dark drink leftover time.