Johnnyp is right about the MtG way of thinking. I myself was playing Vampire the Eternal Struggle (VTES) while in the UK and it seemed very strange to me that older cards in a game cannot be used in tournaments.
However, you can still play using ye olde sets with friends - just not in tourneys ...
There are a couple of people playing with 8th edition cards (we are on the 10th edition now).
It's true though that because of the way the game is developed, imho, it nullifies lore (a VTES playing friend said they go round this problem by having NO lore!) and also the balance of certain combos is "broken" if you use different sets in the same game ...
In any case, what I always advise is to buy a ready made deck and play with that for a while to minimise costs. If you like it, buy boosters to make it better.
YuGiOh is by far the most popular TCG in Cyprus atm, but is relatively simple compared to MtG. Having said that, the "legal" sets for tourneys are not the ones from only 2-3 years past - rather you can use older cards as well ...
I am looking for people wanting to play Dungeons to get a group going
.