image size and unit price

Hi, in “products” template block i need to change two things, first is the actual size of the image – it tries to download 270×270 for some reason instead of thumbnail(150×150 – where i can change that size?

Second thing – block is getting price for ALL units from single product, i need to attach single unit price – how i can do it?

I’m familiar with coding, just need the proper direction.