Heater and ac doesnt work,fuses all work - 1997 Toyota Corolla

Try taking apart your Heater Core (old cars are attached to the firewall, new cars have thiers under the dashboard) and check for any mouse nests, inoperative door openers (openers usually run off of vaccume or small electric motor), obstructions of any kind, etc. most of the times these problems are resolved with something simple like a pen having fallen in and blocking the doors from opening. also, have your A/C checked to see if its full or leaking by a professional (unless you know how to do it yourself) your heater core could also be clogged so let the engine warm up and turn on the heat( yes i know it wont work) but if the core (looks like a small radiator) is cooler than the coolant temperature then it should be replaced. while your digging around down there it would probably be a good idea to check out your squirrell cage (blower motor for the heater core) and see if it spins when the power is turned on.
         Hope This Helps!
                                 Joe.