97 corolla can't start my engine!!!

I can't start my car just today. It was running great the days before. My friend told me may be ran out of battery so I bought a new one and replaced it, but it is still the same. Does anyone know what is the problem and is it a big problem. I just bought my car 2 weeks ago........

What does it do and what doesn't it do? Does it turn over, but not start? Does it only click? Nothing? what???

if anything you may need a new starter or a solinoid...it would help alot though if you could describe what it does and doesnt do...apparently it doesnt start but does it make any noise, does it crank, etc, etc...