Yes, you can bulk upload products and customers using a CSV file. Important information would be e.g. name, picture, dietary information (vegan, nut-free, etc.), product description, prices.
Yes, we offer integrations to various accounting software like QuickBooks, Xero and MYOB, online payment gateways like PayPal and Stripe, marketing tools like MailChimp, and Google Calendar. We can develop integrations to third party software at an agreed cost.