Can Oracle TimesTen run on Vista 64 bit?
It depends on the version.
If I look atTinmesTen 7.0.5 Release notes about supported Windows platforms:
If I look at TimesTen 11g Release 2 Release Notes about supported platforms:
So, the latest version will support your platform.
As a side note, I think the latest version is in the middle of being released, as the documentation is in OTN but the download link is not there yet. I hope it will arrive to OTN in the next few days...