Here's a guide for you to root your Galaxy Note 1. This guide works for a lot of Note-1 models including the GT-N7000 and the GT-SGH-i717 , make sure you use the updated CWM recovery instead. Currently this root guide is for Windows only.
For those of you who want to get the latest Android Update on your Galaxy Note 1, check out the latest CM13 ROM with Android 6.0.1 Marshmallow. Based on latest Android 6.0.1, this ROM brings you the best of CM13 with all of it's customizations. Out of the box, you will get all of the latest Android Marshmallow features along with CM13 features like AudioFX, CM themes (compatible with all CM13 themes), and more.
Lollipop with Cyanogenmod 12.1 is now available for the Galaxy Note 1 . CM12.1 was much awaited for the galaxy note-1, and the wait was worth it. it is a very good ROM and works flawleesly but no bugs. The ROM is absolutely flawless,probably the best ROM you can get for the Note-1 Everything also works out of the box,incuding network,data,wifi etc..