In my opinion a tablet, either an iPad or one of the many others available, is a marvellous addition to a pc, not a replacement.
What software do you intend to use to 'keep in touch'? You don't need a £400+ iPad to use Skype.
Unless you enjoy splashing out I would suggest you consider buying a new pc, desktop or laptop, for around £300 and if you really want a tablet for playing with buy one for under £200. Something like this 7"
Amazon.co.uk User Recommendation