I was transferring data from my old iMac to my new iMac via Time Machine. After about 4 hours, the electrical power fluctuated and turned off my wi-fi. Now most of my necessary programs are useless. How do I erase and start over?

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I was transferring data from my old iMac to my new iMac via Time Machine. After about 4 hours, the electrical power fluctuated and turned off my wi-fi. Now most of my necessary programs are useless. How do I erase that mess and start over?
Hello there, LynnS.
The following Knowledge Base article and it's referenced link should get you started with the Erase and Install of Mavericks:
OS X Mavericks: Erase and reinstall OS X
http://support.apple.com/kb/PH14243
Once you've gone through those 2 articles, this article should help you with restoring from your Time Machine Backup:
OS X Mavericks: Recover your entire system
http://support.apple.com/kb/PH14185
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.
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