You should receive an invoice in the box as well as be able to pay with credit card, PayPal, Alipay, or if you are in the USA you can apply for an Apruve line of credit. Our payment methods can be found here. However, we cannot provide a formal quote for you.
You should also be able to put a separate billing and shipping address just fine. However, at this time, the TI store is unable to provide Certificates of Conformance for orders placed. If you require a Certificate of Conformance, you should order from a TI authorized distributor that serves your region and can provide you with a Certificate of Conformance for the items you order.