1) No - you have to get it from the site.
2)Yes. you have to have the money on by the anaversary date - then they take the £10 off. If you forget to top up - they will add the bungle to your sim again when you ahve the money on.
3) Dead easy - get the PAC from your current supplier - ring them - they'll sort it out.
It's a great text and calls offer but be aware of the GPRS charges