I'm not at all an expert in grading, the only thing that I could add about the 3d piece is that in 1762 (the first year of issue) there were possibly over 40 different dies with minor design variations.
The bottom coin is James I halfgroat, second coinage period (1604 - 1619), the variety with smaller crowns above the rose and the thistle, which, according to the Coincraft Catalogue, is worth a few £'s more than the larger crowns one.