1991 Honda Civic

This week my car was flooded by a flash flood from the neighboring creek. The water and mud reached the top of the instrument panel inside and layered the entire interior and engine in silty mud.

My question is where do I start to try and get it working again. I have gurney'd all the mud off the engine and the interior. But don't know where to go from here. The dip stick in the oil far surpasses the level where the oil should be and the transmission fluid also looks to be full. I don't know how to check the petrol tank for water. The break discs appear to be rusting up after only a couple of days. This is my first car and would love to have her back on the road as before the flooding she worked near perfectly. I am a little reluctant to sell her for parts but will do so if there is no hope. Any recommendations would be greatly appreciated. Thank you.