Just getting into biking
Solid, yes. Worth it? Probably not.

Unless it has been kept in perfect running condition, a 30+ year old bike is going to need lots of maintenance. IT will also have really outdated parts. Finding spares will be difficult, newer parts might not fit at all. All this boils down to maintenance nightmare.

Even if you find bike that's perfect to ride, it will still be an old bike. It will be heavier and its' gears and brakes won't be as good as in newer models. Unless you get a kick from riding vintage bike (nothing wrong with that), I'd go for more modern one.

This site has 1980 Schwinn Traveler specifications: http://schwinncruisers.com/catalogs/1980.html.

At least the 27" wheels that the Traveler has are going to be trouble. 27" size is not used much these days. Finding new tyres/inner tubes in case of flats will be tricky.