Shopify requirements

I’m setting up a Shopify webshop and need some additional knowledge.
Payment and pricing
01. Webshop is B2B
02. Language is Dutch (possibly English)
03. Payments (on invoice or iDEAL)
04. Shop prices should be excluding VAT
05. On checkout it should be with the taxes added
06. Product (software with different sizes and prices)
07. Price for some products: Ask for a Quote
Browsing and product views
01. Need some assistance in setting up the products (tagging, groups etc)
02. Layout of the webshop
03. Similar sizing of products listed
04. Vendor selection, tags
05. Remove prizing filter
SEO optimization