Hello and help! Lol

Hi, ive just got a p38 51reg 4.6 and the doors dont lock off the fob or key, the book signal is showing and the heater isnt getting cold. The brake pedal is fairly stiff too and the abs tc lights are on (accumulator problem maybe). Any advice would be greatly appreciated. Thanks in advance. Appart from that and it REALLY needing a good scrub its lovely! 😃 Thanks in advance. Jase