I recognise a few of them including...
9 and 15 are British pennies... and 6 is an Irish penny, 5 is a British 3 pence piece and 16 is a British silver shilling.
12 is a Nazi 10 phennig and 8 is a 5 phennig also from Germany.
Its true that some have worth because of their silver but the most accurate way is to idenintify them and look up their values as sometimes one date can be worth far more than another.
You don't have the crown jewels here but still a varied selection and some have a little age to them :)