Well what you get with a normal purchase of the Wii console is the console itself, a Wiimote and nunchuck, Wii Sports, and all the cords and plug ins needed to work the unit, like the sensor bar etc.
The package you are talking about seems to have some things that are not necessary. The cooling stand is for if the console gets hot, it helps control the heat (although the Wii never overheats, or gets really hot), so the cooling stand is not needed.
A memory card does not always come with the Wii, but one is needed if you wish to play Gamecube games. Wii games save right on the Wii's internal memory, which is 512mb.
A charger is also not needed, energizer batteries last a while I find, so charging batteries is not always needed to be done.
A nunchuck is needed in a lot of games, having one is recommended.
Some games use a variety of controls, some will use only the remote, others will use both the remote and nunchuck. Having one of each is needed, and having more depends on the game being played.
Like if you wanted to play with more people in say a multiplayer game, you would need enough controllers and types of each (wiimotes and nunchucks) depending on the amount, however the max you can play with at one time is 4. So have four Wiimotes and nunchucks if you are playing with friends.
Personally not buying that package was a good idea, just stick with the normal purchase and upgrade from that with what you see fit, what fits your needs.