Welcome to the forum bud
I know little about first gen legends, but I can give you a little advice for your repairs:
1. the transmission issue will likely be the most expensive and/or time consuming job, however from what you described it will also be an essential. Transmission work is often a task that's out of the hands of your average joe, so I personally would suggest to try and start getting repair quotes, I wouldn't be shocked to hear over 1000 though.
2. fixing an odometer shouldn't be overly hard or expensive (if you care to fix it) but you should be comfortable pulling stuff apart and remembering how it goes back together. More than likely you will have to hunt down a replacement gear
3. Taillights shouldn't be expensive, but might turn into a bit of a pain i the butt. We have service manuals available to read online in the various parts of the forum for our cars and I'm sure theres a dozen people who have fixed every issue you're describing and will be glad to give more details advice and instructions. Tail light repair will be something like this:
-check fuses
-check bulbs
-check connectors
-test for power using voltmeter in various areas
Since you're new to cars I'll tell you this: Most repairs for cars is easy despite what you hear. As long as you have proper guidance from others or instructions (pictures help!) or knowledge of what you're doing 99% of the jobs are easy. The "hard" stuff is normally just getting to whatever piece you need to replace as many parts are blocked off by other parts, so you have to remove other stuff to get to it.
However, lots of repairs are frustrating, tedious, and time consuming. Patience will be your best friend
With that said welcome and good luck bro, legends are indeed good cars, mine has impressed me well over the years
I know little about first gen legends, but I can give you a little advice for your repairs:
1. the transmission issue will likely be the most expensive and/or time consuming job, however from what you described it will also be an essential. Transmission work is often a task that's out of the hands of your average joe, so I personally would suggest to try and start getting repair quotes, I wouldn't be shocked to hear over 1000 though.
2. fixing an odometer shouldn't be overly hard or expensive (if you care to fix it) but you should be comfortable pulling stuff apart and remembering how it goes back together. More than likely you will have to hunt down a replacement gear
3. Taillights shouldn't be expensive, but might turn into a bit of a pain i the butt. We have service manuals available to read online in the various parts of the forum for our cars and I'm sure theres a dozen people who have fixed every issue you're describing and will be glad to give more details advice and instructions. Tail light repair will be something like this:
-check fuses
-check bulbs
-check connectors
-test for power using voltmeter in various areas
Since you're new to cars I'll tell you this: Most repairs for cars is easy despite what you hear. As long as you have proper guidance from others or instructions (pictures help!) or knowledge of what you're doing 99% of the jobs are easy. The "hard" stuff is normally just getting to whatever piece you need to replace as many parts are blocked off by other parts, so you have to remove other stuff to get to it.
However, lots of repairs are frustrating, tedious, and time consuming. Patience will be your best friend
With that said welcome and good luck bro, legends are indeed good cars, mine has impressed me well over the years