Well try to install YAML first then run your command i.e. install Tk. I am working on windows and I used to run this to install Tk:

(For 32 bit) ppm install http://www.bribes.org/perl/ppm/Tk.ppd 
(For 64 bit) ppm install http://www.bribes.org/perl/ppm64/Tk.ppd
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So instead of ppm install you should use apt-get install. In extreme case, if this doesn't work then I'll suggest to download the package from cpan and run following:

perl Makefile.PL
make
make test 
make install
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I think that much is enough but in case if you need more help please read Install file inside that package file