NB: In a comment below, a participant posted some points about when the paschal candle may be used in the Extraordinary Form. Don’t just read my answer and then move on without also reading that comment. You will know which it is.
From a priest:
May the pascal candle be used at EF baptisms?
Well… sure! Why not?
The older Rite doesn’t say anything about it. But, hey! Nice candle! Let’s light it!
At a certain point a lighted candle is handed over. Why could it not be ignited from the big pretty paschal candle?
The paschal candle in the older Rite is plunged into the Baptismal water. Other candles are set to burn from it.
BTW… the maniple can be used during for Mass with the Novus Ordo too.