Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi, I just started playing on this server and I wondered how I could display the health and mana bar on my target unit when hovering my mouse over the bars or simply show hp/mp all the time ? Usually it's in the interface configuration but I guess it wasn't implemented in Vanilla.
Thanks

No, you are right.

You can download the MobInfo2 addon, this will calculate the mob's health.

Okay thanks a lot !