2000 Vauxhall Agila DASH, L/HANDSIDE LIGHTS, PLATE LIGHT

Hello,
just had mot, brake light switch not working, and reg light not working. Replaced both, everything fine. Just noticed dash lights not coming on, left hand side lights not coming on, and now reg light not coming on.
to top it all off just taken it for a spin and a light 0n the dash has lit up in the shape of an engine and the car is shuddering after about 5 mins.
Do I just put a hammer through the windscreen, cos thats how I feel at the mo.
thanks for listening.