Garage Floor Question??

I recently bought my house and have been living here for 4 months now. I have 1 1/2 car garage that the previous owner use to park thier car in everyday. The garage floor is now chipping away and cracking.

When the floor get's wet there is a white liquidy substance that come's up from the floor. The only thing i can think the previous owner did was painted the floor with a water base paint. Could it be anything else??

Here are a few other questions:

1) What is the best way to fix the garage floor so it it looks new?

What can professionaly be done to fix the floor? Can a thin layer of concreate be poured over the current floor to make it look new??

2) Is there anything that can be applied to make a floor last? Concreate sealer??

Thanks in advance for any help.

Ray

 

bump - please help