Is it my alternator and/or battery, or worse? on 2001 Ford Escort

First noticed the speedometer dropped to 0 the started working then stopped, etc. The tachometer stopped completely, then idiot lights came on, starting witht the brake light, then seatbelt, etc. After parking, the engine idled high then low. I pulled the battery cable and it died. I hope it only the alternator but and concerned it might be more.

Asked by for the 2001 Ford Escort