The coupon rate is 7.40%. Details about the interest paid are included in the name itself. This bond is named 7.40% GS 2062, here’s how the nomenclature works;
7.40% - Interest paid
GS - Government Security
2062 - Year of maturity
You can check interest payment and maturity dates for all G-Secs here: Interest payment dates for government bonds (G-Sec)
You can learn more about government securities here:
Yep, the brokerage charge to invest in G-sec through Coin is 0.06%, i.e. ₹6 for every ₹10,000 + 18% GST. Explained here.