ok the reverse lights will most probably be the switch on the gearbox...either the wires have come off the switch or the switch is broken, always best to just replace. Most of the rear lights are probably just an earth problem. With the battery not holding charge obviously something is draining it and or the voltage reg probably not working properly but just test with a multimeter and you will find the problem. Probably best to check all the fuses properly by removing and cleaning the terminals, clean all terminals with crc or wd40 on the contacts(an old electricians trick which i got taught). and the display not working best to check the dash....not hard at all to just take the facia out by itself and just test from there. With the window winder take the trim off and have a look at the mechanism if its stuck just take it off and get one from someone, im sure someone will have one. Wiper blades you can pretty much get anywhere. Noise from the rear wheels could be anything best to jack it up and check the brakes and the wheel bearings. Drivers door its best to check the alignment and see if you can get it to shut properly otherwise just get another door lock. With the radiator under the cap is where it is meant ot go to an overflow take either fit one or solder it shut but best to get an overflow tank as they can come in useful. With the head lamp check the connections as one or to may no longer be attached to the light properly anymore or there is some corrosion in the plug, just unplug and see the spray crc or wd40 into the plug and retest again. I hope that helps

it would mostly be easy fixes ,as for the license plate light it could be where the parkers feed is joined for it ,it could be scotch locked or it could have a bad earth ,and the interior light wont have an auto on setting cos i dont think 1200s came out with an auto on and it can be done by adding the little pressure switch in the door ,and then running it to the light ,but most things on your list can be easily fixed with a test light and a soldering iron

good luck

sounds like a bit of work??
hope your good with eletrical??

ur location too will help

I proudly bought a 1976 Datsun b120 ute about 2 weeks ago. I've never owned a classic car before but always wanted to...so I am quite new to this whole thing. I am not mechanically inclined at all but I intend to learn. So far I have done major repairs to the body work where there was rust and I've replaced the battery. The car seems to run fine but it has some slight problems. I am too anxious to get it on the road but I am worried that it won't pass roadworthy. Would rather try and do the work myself than take it to a mechanic and pay loads of money. Just looking for some help from the experts and wondering if anyone has encountered these problems before:

1) New battery will not hold charge (I've replaced the old one because it did the same)
2) Driver's side headlamp is out but works when I fiddle with the 3-prong connector
3) Driver's side indicator will cut out randomly
4) I notice after the engine runs awhile there is a slight leak at the top of the radiator...seems to be because the hose is pinched under the cap?
5) Passenger window winder is broken...assuming I can get one from the wreckers?
6) Wiper blades need replacing...does a normal auto store carry these?
7) Reverse lights do not work, replaced all the bulbs still don't work
8) License plate light doesn't work, checked bulb and it appears fine
9) Dash lights for tachometer and speedometer not working...don't know if its the bulbs or wiring....I've checked the fuses under the dash and they are all intact. Too afraid to remove dash.
10) Driver's door lock doesn't seem to work but I noticed that driver's door doesn't fully close, is this why?
11) Noise coming from rear wheels when I drive it, could be wheel bearings?
12) Interior dome light doesn't seem to have an auto function...it's either on or off

Maybe I'll post some pictures of it soon. Thanks.