First is a coin of the Isle of Man. Probably a penny of 1786. Very worn and not much more damage you can do. A couple of hours soak in olive oil followed by a gentle wipe and rinse under water might get some dirt off.
Second a Victorian florin(?) (Florin (2 shillings 28.5 mm diameter) or Double Florin (4 shillings (20p) 36mm))
I wouldn't clean it at all as that will damage it. The contrast makes it hard to see detail but it's not obviously worn. Bigger photos (ideally on a lighter background as often cameras average out light levels making a shiny coin on a dark background too bright to see detail) might help but it's a common enough year so ...well, don't go eyeing up any sports cars just yet!
For future reference, if you give the size (diameter in mm) it's easier to identify the denomination (face value) of the coin.