If you have access to concierge lounge M-F they have breakfast as well as snacks and light dinner and desert.
There is no free breakfast unless you book it with the Room (not free but built into the rate). They are good about upgrading rooms if you are SPG Gold/Platinum. I've stayed here numerous times for business.
Only if you have access to the concierge lounge.
They don’t. There is a restaurant in the lobby, and a breakfast place just off the parking lot.
Get an answer from Renaissance Austin Hotel staff and past guests.