Traded homes and iPhones in Europe now and this an old iPhone 4.2.1 unable to get my mail from mail or sign into icloud on the Internet in safari on this iPhone

You need an device (iPhone, iPad, iPod touch) with iOS 5 if you want to use iCloud. Furthermore it is also not possible to open www.icloud.com with Safari on an iOS device.

But if you want to set up Mail on your device with iOS 4 then you can do it manually. Therefor follow these instructions for devices with iOS 4: http://support.apple.com/kb/HT5330