There are a lot of excellent online resources you can look for - and it depends a lot on what type of cards you are interested in. My current favorite site for buying trading cards - both sports and non-sports is the Trading Card Yard.
you can buy club penguin trading cards at your local newsagents
You can't. I think you used to get them in the magazines (the UK ones). But you can still buy some of the trading cards on eBay.
Do not get the trading cards get kinz style or the figures the codes are junk
You are able to buy the most recent New Moon trading cards at the Amazon website.
You can buy Moshi monsters trading cards A.K.A Mashup cards at a Spar Shop or if you buy a Moshi Mag sometimes they have some cards free with the issue. Hope this helped Add me on moshimonsters:cairnrodgers
You can buy Trading Card Binders at the Wshop:)
Specific shops sell Trading Cards.
Poundland
eBay
you can buy it from news angents
You have to buy some trading cards
It's a mystery. Wish it woz me!