a) you're lucky no insurance, If at all possible I'd say
don't!
I got driven into 3 months ago and my poor car still looks in exactly the same state as it did after the smash. (Hugely dented in front wing and pass door, scratch down the entire NS)
b) Looking at that car, by eck there's time and effort in that, love the idea of Porsche wheels. I'd say keep it, keep it. But depends if you have sentimentality there or purely as a cost exercise.
Realistically it's a PFL headlamp, under-lamp trim and a slam panel and you're back on the road. Other elements are cosmetic and consequentially less of an issue. £100 might see that right, which is nothing in the grand scheme of things. You're close to making buying a donor car being a feasible option, depending how cheap you get one for and what you'd re-sell the donor for as scrap/spare repairs itself.
Sorry to see your car like this, but I'd say easy repair, and well, well worth saving.