Wow-so much wrong and the bike isn’t worth the time or investment to bring back. Triumph’s were lower on the quality scale of Raleigh sub-makes and being 1974 isn’t old enough to rate as a vintage or really collectible. It’s a bike that can be ridden -after fixing those half cocked crank arms- and that about all it has going for it, unfortunately. Best suggestion is be patient, do your homework and get the most original, complete and rust free Roadster you can find. Good luck and welcome to the CABE!