An attractive set, and it will probably perform well after restoration.
Have you ever worked on a tube radio or TV before? Every tube TV is complex and has dangerous high voltage. I would not recommend trying it yourself if you have no electronics knowledge or experience.
If you look at TV restoration articles in this section, that will give you a general idea what's involved in making them work again.
http://antiqueradio.org/restoration.htm
It usually demands more than just popping in a new tube or two. The TV is full of old capacitors that degrade with age whether or not the TV is used. Until they're replaced, the TV is unlikely to be reliable, even if it seems to work after a fashion now. This article has general advice about replacing capacitors:
http://antiqueradio.org/recap.htm
If you don't want to tackle restoration yourself, this page has some advice on finding someone to do it for you.
http://antiqueradio.org/howfix.htm
Phil Nelson