You have everything you need. For any of your measurements that go around the foot, you multiply the number times your stitch gauge (5 stitches per inch). I wouldn't add any ease, unless you want slouchy socks.
For any measurements that run the length of something (length of foot) you'll need to use your row gauge which you haven't specified yet.
Are you trying to work knee length socks? If so, you will want to make the top of the sock very elastic. You might want to read through this thread
Jody talks about some of her considerations in working knee socks. I don't think the sock is finished, but she has some interesting suggestions.