If you´re cleaning the carpets, use any standard cleaner for this use and vacuum thoroughly.
Orange oil products for car interiors work very well.
Scrub rubber mats in the bath and dry well. One word of warning - DON´T use ´Back-to-Black´ type silicone products on your rubber mats - you will end up head-over-a..... both inside and outside the car!! I know, I did it!
My granny used to say "there´s no substitute for spit and polish."
For some things regular car wash soap and water works fine, like the floor mats. For plastic and vinyl surfaces like the dash, I like "Tough Stuff" which comes in a yellow spray bottle at auto stores.
Hey, and when I bought my 91 in June, my friend (a girl) had just washed it, had the oil changed, and the interior was spotless. I mean everyone who rode in it commented on how clean it was for months.
well, i went out to my friendly pep boys today, got some oil, a filter, some bolts to bolt my exhaust back together...and than i checked out the clean products...so, i bought some tough stuff, power purple (cleaner/degreaser), deodorizer, and some air freshener....
tomorrow night at work it´s gonna be a rough one....change the oil, than clean....sound be fun...
and i don´t have rubber floor mats at the moment....so, next thing to buy.....floor mats and seat covers.... than comes the system install