I agree with all that's been said. Here's a good analogy.
You just found Grandpa's 1955 Chevy in a garage. It drove great when put away and hasn't been touched in decades. Can you just top up the gas tank and drive off on a cross-country trip?
Like this TV, the car has many things that have gone bad from sitting around. The oil in the crankcase is sludge and needs to be drained. The rubber things -- fan belt, radiator hose, tires -- are brittle or cracked from oxidizing and have either fallen apart or will quickly do so when you drive. So on and so forth.
It's a good sign that your TV sort of comes on. But that's like charging the battery and getting your Grandpa's engine to turn over. It tells you that the engine is not completely destroyed. But it's not safe or sensible to drive the thing in this condition.
Perhaps there's someone in your area who can fix it or coach you in learning how to do it. Here's a list of collector clubs. Many radio collectors also collect TVs or know how to fix them:
http://www.antiqueradio.com/clublist.html
There may not be a club next door, but they might know someone closer to you.
Phil Nelson