I change consumables - Toyota Corolla, 1.3 liter, 1998 for DRIVE2

I decided to go broke - I bought candles, fuel, oil + oil.
Replaced candles on Denso relatives. On the second armored conduit, something iron in the armored conduit burst out with roots - what is put on the candle) Put it back in - it works, but they say it's better to replace it. He removed the fuel filter - a bunch of rust. 50 thousand it was definitely not changed ... Replaced by SCT. I'm looking for some - I don't want to: (listened to the fuel pump - I can't hear it. The cover under the seat was removed, tugged, it started working. They felt the oil in the engine - with grains of sand already. I changed the oil, pour Esso Ultra 10-40. It was always poured into it. As a result: responds better to the gas pedal, accelerates better. It is necessary to change the air - for the experiment, when they put a zero-wheel - they cut off the tube from the air vent cover for the adapter. Now I can not find a whole cover for the air: (I think to glue the old gauze and epoxy. Now - with a sharp press gas - failure and suction noise.