Not sure what you are asking, but this is an SAE set and does not contain any SI dies, taps, or drill bits. HD does sell a couple of combination sets and also some purely SI sets. Here is a link to a search result that might help you https://www.homedepot.com/s/Metric%2520tap%2520set?NCNI-5
Yes. The 1/4 inch tap does fit but if used with smaller taps will have to be forced open a bit to insert larger taps.
8-32 10-32 10-24 1/4-20
Yes. Use plenty of good cutting oil. Go slow. Cut 1/4 turn at a time. Back off to break the chips.
No the largest tap is 1/4"
No dies are not that big.
No. T-Wrench is junk.