Does this Walmart have Western Union

Yes

They don't but Wal-Mart is jumping into the money transfer business. Starting April 24, customers will be able to transfer up to $50 for a $4.50 service fee and up to $900 for $9.50. ... The Walmart-2-Walmart service is being rolled out in partnership with Ria Money Transfer, a subsidiary of Euronet Worldwide Inc.

Yes it does

Yes, Open until 8:30