Fast travel to Kvatch and seek the orc merchant or to Silver Road in Cyrodill and seek the merchant in green clothing.
The ten races are: Imperial, Khajiit, Nord, Orc, Redguard, Wood Elf, Argonian, Breton, Dark Elf, and High Elf.
I've never seen an orc with a dog before?
Some of the tasks are timed (like escaping from a giant sleeping Orc before he wakes up), so you have to be quick with the actions.
Argonian, Breton, Dark Elf, High Elf, Imperial Khajiit, Nord, Orc, Redguard and Wood Elf.