On the radio, I heard an ad from Midas, who do car repairs. They used a slogan:
On fait tout
We do it all
Except the speaker didn’t pronounce tout as tou. He pronounced it informally as toute. This isn’t a feminine form; it’s just the final t of tout being pronounced, which can occur at the informal level of spoken language.
On fait toute — toute, toute, toute!
What about the vowel sound in toute? Have you heard the way it sounds as you listen to spoken French from Québec? You can hear tout pronounced as toute on this page. Click on the red son button beside the word tout.