Q: overheating, engine light and on board computer problems on 2006 BMW 530i

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
sequence of events:
1. battery died from lack of use. After recharging engine light stays on. indicates overdue maintenance on 3 items filters and oil)
3.I can't check oil on computer. display, stays lit fully up regardles of engine running or not. overheats radiator fan works ok. I can lower temperature by running interior heater on max.
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