Taxpayer Transparency Act of 2013 - Requires each communication funded by a federal agency for advertising or educational purposes to clearly state: (1) in the case of a printed communication, including mass mailings, signs, and billboards, that the communication is printed and published at taxpayer expense; and (2) in the case of a communication transmitted through radio, television, or the Internet, that the communication is produced and disseminated at taxpayer expense. Requires any such printed communication, including e-mails, to be of sufficient size to be clearly readable, to be set apart from the other contents of the communication, and to be printed with a reasonable degree of color contrast between the background and the printed statement. Exempts from such requirements: (1) information in or relating to a solicitation for offers for a federal contract or applications or submissions of a bid or proposal for a federal grant or other means of funding under a federal program; and (2) advertisements for employment opportunities, not including advertising materials developed for use in recruiting and retaining personnel for the Armed Forces.