How do you install a towbar to a 2001 magna TJ sedan

see
https://www.towbarsaustralia.com.au/towbar-kits/cruze-wagon-jh-series-2
Hardest part is you need a torque wrench and electronic knowledge.
I got a towbar from them and asked my mechanic to fit it for a cost - it was much easier than me trying to install it on my magna

I think you should buy repair manual first for your vehicle after that it will be easy for you to solve the problem. Check the link may be you will find something useful here
Complete Mitsubishi Magna 1998 2001 TH Series 1998 2002 TJ Series Verada...

Good tutorial here:

http://www.a5oc.com/forums/a5-s5-topics/6092-diy-foldable-tow-bar.html#/topics/6092

There are Magna workshop manuals readily available to show you how to do this work.
Buy one of them.

rear bumper off
the towbar should bolt on as is
then wire up

yes

Towbars are fairly simple, if the towbar fits the frame, you are all set, if it doesn't, you have the wrong one. If there are holes that line up, use them, if not, you can drill through the frame very easily, it is soft steel, Put some bolts in there that go through about 1/2 longer than the frame parts. Support the towbar with a jack, make sure it stays put. Drill a small pilot hole first with about 1/4 inch bit, then go to the hole size of the towbar, 1/2 inch. Those step bits work great, put in the bolts, tighten them up, all set. As far as positioning this thing, I would make the ball stick out just past the bumper, if no hole line up. You don't want to be smashing the trailer into the bumper all the time, so make sure it is enough, but not so much that you trip over it. Hope this helps.

you open up the hood of the car or as it is called bonnet and you go to the back of the headlight there shold be screws there and you open the and simply pull out the cover and pull out the bulb

You can get an adapter that fits in to the 13 pin socket that give you a 12N socket, easily available on E-bay

http://cgi.ebay.co.uk/13-to-7-Pin-Adaptor-for-Euro-Style-Towbar-Electrics_W0QQitemZ110303426204QQihZ001QQcategoryZ36631QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I have one for my car and it does the trick

yes it will work because the connection points are the same.. pplease rate this thanks