Is it my axle?

I drive 96 Toyota Celica and whenever I am driving, the inside of the car sounds like a ';pod-racer'; my friend says. The noise becomes louder on the freeway, and even louder when I change lanes on the freeway. Is this problem my axle? How much would it cost to fix this problem (approx.)?Is it my axle?
Don't know what a pod racer is,or what one sounds,feels,smells like.

You have a noise when the weight of the car is leaned from one side to the other as in changing lanes or turning a long curve at say fourty and up.

Slight roaring from one side.Thats a hub bearing.Not a job for a back yarder.They need to be pressed off and on.After removing Brakes,ball joint,axle,spindle.See a good repair man an get his opinion.Good luckIs it my axle?
Does the sound change when you're turning? If so, it might be a wheel bearing wearing out. As far as I know, the rear wheel bearings are adjustable, while the front bearings must be replaced when worn out; this, however, shouldn't cost a fortune.
Not that much info. What happens in town and when you're turning Left or right? Bad Tires, CV Joints or Weather Striping.
Sounds like your muffler. The axle usually makes noise when you are turning the corners.

Mufflers are different prices for different cars.
Check the brake pads they have a metal arm that is designed to make noise to tell the driver they have a minimum amount of padding left.