What is drive current for a PAD and how to decide drive current for I/O PAD while doing characterization.Also how to calculate the pull-up and pull-down resistance for I/O pad cells.
So why don't you simply have a look into the respective TSMC Standard I/O Lib Data Book? E.g. this one:
If you rightfully got the schematic and/or layout of the cell, you'd have access to it, too. There you can find the drive capabilities:
Pls. notice the correlation between a part of the cell name and its drive capability!
If you want to simulate: Enable the output, set a logic input voltage, measure the output current, either in short circuit mode, or into a known output load up to your requirement. Repeat this for the other logic input voltage.