Does the federal government pay sales tax?

No...sales tax is a State level tax...the Federal Gov't is exempt and immune from state taxes.

However, the Federal Government does pay taxes on all of our own money.

The Federal Reserve is a privately owned bank that prints money and lends it to every US bank - as well as to the US Government, when

There's some useful information here, if you'd like to learn more: http://www.federalbudget.com/

(Also, search "The American Dream Movie" for a very well animated explanation.)