no service light
service manual from nissan I think are around £8
price varies on where you live, P1 can start from around £100 but seen members in london area pay £170.
You could go to a good independent for you service. Abbey Motorsport or Dixon Motorsport, two traders here that do service. May be also CS.
Other members may also advise on good independents to try
plenty of info on the forum, just try the search button