Please, someone who nows what they're doing, help me!

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http://forum.xda-developers.com – I made a not to wise choice and bought from a china store. The mini tablet I bought has no app market installed. I have download many "google play store '.apk'" files and they all install, when I open them, they crash RIGHT off the bat! I have done this at least 5-10 times. If anyone...anyone... can help me, please let me know! Please, please, please. Thanks a ton for anything, Thomas Sent from my Lenovo Ideapad K1 using xda app-developers app (HowTos)