Are these modules good for what I want to do?

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hey guys. started using arduino , i'm not @ knowing each module doing. got list modules , appreciate if can tell me if can use them want or not.

1. http://www.ebay.com/itm/esp8266-serial-wifi-wireless-transceiver-module-send-receive-lwip-ap-sta-arduino-/252063412097?hash=item3ab0266f81:g:7saaaoswpcvv1cg7
i want able connect wifi network, navigate different web pages , read source code.

2. http://www.ebay.com/itm/dual-h-bridge-dc-stepper-motor-drive-controller-board-module-arduino-l298n-hg-/281551893660?hash=item418dccf49c:g:sm8aaoswygfusj9i
i want able rotate wheel using motor. maybe connect wheel door lock , when start motor key rotates , lock/unlock door. i'm not sure if motor doing since i'm not seeing part can rotate. dont know if has enough power that.

3. http://www.ebay.com/itm/detect-the-heartbeat-module-ky-039-for-arduino-/251523815989?hash=item3a8ffcda35:g:lcqaaoxy63fs440s
i want able put finger on led , give me pulse.

these modules i'm interested in , dont have.
also, if can recommend other fun modules can play love that.

thanks!

forget first one. that's pi job want do.
the others fine learning.


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