8 1/2 x 11 spiral notebooks (that are on sale at Staples for 17 cents this week) or binders, paper (essentially free in the US), and sheet protectors (plus back to school weeks are coming up). They use A4, 8 x 14(?), which don't fit into most bookshelves!!
Unless you already own something, especially if it is expensive, or decide to DD it, most everything will turn out cheaper in Israel than buying in US and shipping.
IINM I think the modem you get for free with your internet service has a router built into it. You either have BEZEQ or HOT for the tashtit and then any number of carriers for the service. ORANGE is 972-74-707-3100. It used to be x1-1-3-2 for a live person.