mazda soho 121?

i have a mazda soho 121.i just bought this car because im a student and dont make much money.the car has been standing for 4yrs without moving.now that we replced the fuelpump we manage to get the car started.the problem is that the car has a miss on it and when i rev up the engine i hear a noise on it.sound like a bearing but its not because we have checked the bearings.When you rev it up it makes a clicking sound like metal scrape.please help me solve this problem as i have bought it from the previous owner and the last he drove the car was 4yrs ogo

Thanks