VGRS and ABS lights, car won't start

[abtx]

I've driven a bit yesterday and got the VGRS and ABS lights lit up together with loud long beep. Today this happened right as I started the car.  I turned it off, and couldn't start again. I played with the button and eventually things slowly died out. What would make sense to do to diagnose? Jump it, replace the Battery if the jump didn't help? 

[LexIS200Sport]

It could be that your 12V Battery is on its way out? Mine is a 450h but I do get the VGRS error if my 12V Battery is very low on charge.

I'd certainly try a fresh 12V Battery as a starting point.

[abtx]

24 minutes ago, LexIS200Sport said:

It could be that your 12V battery is on its way out? Mine is a 450h but I do get the VGRS error if my 12V battery is very low on charge.

I'd certainly try a fresh 12V battery as a starting point.

Hopefully it is not alternator. Had the Battery light flicker once before, might have been an indication of Battery running out. Battery was last replaced in Sept 2014 I guess that' pretty old.