Generally, products are available for 5 years, insofar as there is no alternative suggested or the product has not been flagged as a phase-out product.
This information can not be answered in general. The measurements of the products are very different. Packaging for automated processing as SMD Reals is referenced in the product data sheets.
The delivery times can be discovered by checking the Stock Check or in the section Stock Check Distributor in real-time. Basically, products, which are labeled with "A=regularly ordered", are available in the shortest time.