The transmission will not shift into any gears on 94 Corolla?

What is your question?

Just purchased the car a few weeks ago and it ran great. All of a sudden, the tranmission will not shift. I was told it had a new transmission in it but no other details. I was also told it might be a shift sylenoid (sp.?) I'm worried about repair costs if it is the sylenoid. Advice or recommendations great appreciated.