That's really too beautiful of a radio to use for your first electrical restoration project! If it has not been plugged in recently, the tubes are probably fine. The wax-paper capacitors and electrolytics will need to be replaced, switches and controls cleaned, and possibly other repairs. Hopefully someone in your area familiar with old radio restoration will chime in and help out.
Don't plug it in!!!
The old capacitors will be electrically leaky, insulation will have deteriorated, etc. At best you'll wreck something expensive in the set like a transformer, at worst you'll have a serious fire and shock hazard. After replacing the paper and electrolytic capacitors, you'll want to bring the power up slowly with a series lamp or Variac to check for other problems.
I don't want to scare you off, the radio is very nice and making it play again is certainly something you should do. But you need to enlist the help of someone who has a bit of experience with these things, preferably local to you so as not to damage things by shipping the chassis.