@ harrypottar
Skylanders works on the same bases as DI as in the game you can change the character over when ever you like and what gold coins /experience points you have collected with that character while you have played it will stay with that character as all the information is saved in the chip that is in the base of the character figure.
Skylander games are generally hack n slash were you kill the enemies as you progress throught the main games story that is split into chapters, depending the characters this can be Close quarters or range attacks, but also you do have mini mind puzzle games which you need to do to open locked doors to carry on or there are mini games aswell. Like in Skylander Spryo's adventure it was card games by matching pairs of identical cards, and in Skylander Giants there was a game call Skystones. Link is below.
http://uk.ign.com/wikis/skylanders-giants/Skystones.
Also as a side missions you are also collecting other items:
Soul gems: Advanced attach power for that figure.
Legendary treasure chest: Extra money.
Hats: Increase the stats of the character i.e speed, armour, critical hit.
Etc.
There are adventure packs and battle packs in skylanders. and their are one of each coming out for swap force at the moment. and there are other adventure packs and battle packs released on the other two skylander games.
http://www.game.co.uk/en/endless-range/ ... charactersBattle packs are a new battle arena where you play player Vs Player.
Adventure packs are a small story adventure all of it own, but adventure figure can be used in the main story as a special magic attack.
Also all character figure from Spryo's adventure and Giants will be able to be played on Swap force and the max level is increased by 5 levels and also all Series 2 & 3 core character will work backwards on the two previous games depending on which game they were released on. But you will need then to buy a starter pack from the previous games to play them as a don't think the swap force portal of power is compatible with the previous games. (but the Spryo's adventure and Giants portal of power are compatible with each other).
So really if you like the games you mentions you probably will like skylanders. So ever pop to a TRU or Toy store where you can get some hand on games play and give it a try. and if you like then you can always get Skylander Swapforce when it comes out.