I changed some light switches and outlets to match the rest of the house. My house is a older home. So when I went to turn the breaker back on sparks came out. So I check the wiring then I change the breaker then there was no more sparks but only one light switch works for that breaker and now 2 bed, and 1 bath area doesn't have any power from that same breaker.

I had this happen 1 time, find the breaker to that area ( turn all power off and shut main breaker down) pull the paneling off remove breaker and re-wire it to another breaker one that is NOT over loaded.. turn power back on and see what happens.. if you get another spark then your power wire (black) must be touching some pice of metal on the switch causeing it to short, 2nd is if you have no power still the first switch the wire runs through may be faulty.. let me know..

Sounds like you lost a neutral somewhere. Pull all the switches and receptacles that you replaced out and check for loose connections. Be careful though because just because the switch isn't working, doesn't mean that is isn't hot. Be sure to turn off the breaker first.