There are two air filters. One is the filter for the engine - this is located inside the airbox (retangular box on the driver's side of the engine bay, closest to the fender). There are metal spring clips that need to be released, and the lip pulled back to expose the panel air filter. The other is the cabin air filter. This filter is located directly behind the glove box, inside the cabin. You must remove the glovebox to gain access to this filter - filter resides behind a retangular panel.
Cabin filter located behind glove box
The 1996 Toyota Corolla does not have a cabin filter.
No
No, Corolla does not have one until 2003
In tank
No, it does not.
inside the glove box
Is in the cover of the air filter
The 2006 Chevrolet Blazer air filter can be found on top of the engine in the air filter housing. You will need to remove the air filter housing cover in order to access the air filter.
The 2006 Chevrolet Colorado does not have a cabin air filter.
This vehicle does not have one.
Yes I think all cars have cabin air filters