kboxer7 thanks for the tag .
As for bitcoin , you will want to use a prepaid credit card to purchase these . If you're planning on committing any sort of illegal purchases learn about breadcrumbs. Tor can protect you to some degree but the breadcrumb trail :ie bank account details, addresses, cell numbers . Can all be traced to you . If you plan on legitimately using the bitcoin then dont worry about yourself.
If intentions are otherwise, look up dark wallet. Remember this , transactions are all kept sever side and geo location-based cookies are kept on your pc to track you aka trackers these cookies can be matched up to incriminate you. Look into PROXYCHAINS and learn how to use it with tor . Learn crypt cat or any encryption software and encrypt your WHOLE PC drive so all u have to do is close lid and it encrypts. Look into Hardware-based proxy which is also called a scrambler . Pm me for any questions about this.