Most of this can be done with version 4, However there are some enhancements in v5 that you may find are VERY important for a pizza business like this. The biggest enhancement will be the labels printed for the pizza boxes. V5 has the ability to individually print Orders and number them like 1 of 3, 2 of 3, 3 of 3 etc. Its called ORDER INDEX and INDEX TOTAL tags which are v5 only. Additionally v5 supports Order Level Kitchen Screens while v4 only supports full tickets.
To get you started though you should read the printing tutorials to learn how to setup your tickets and label prints.