As a person who got into the hobby with the traxxas charger / lipo combo, the chargers and lipos are not worth the money you can charge the lipos on normal chargers if need be but you need an adaptor.
Bit of time researching lipo basics and chargers will net you better kit and more lipos because traxxas ones are silly cash 😲. It can be a bugger finding lipos that fit some traxxas cars, I had a right game finding lipos for the Traxxas UDR and revo 2.0 🙈.
Also chopping off the traxxas plugs off your new traxxas esc will void the warranty of the esc 😬 but thats if you care about that stuff 😆, you could use adaptors but I have found them hit and miss and now just whack XT90 on all my kit 😃 .