Well there are exterminators, but truthfully you can do as much yourself. First search your residence inside for any gaps that a mouse can get through (think small, if a mouse can get it's head through it can get inside) and seal those up. Steel wool packed into the crevice and sealed with caulk works well. Check underneath all your cabinets, plumbers are notorious for leaving 1/2" to 3/4" gaps around plumbing fixtures, seal those up, the same goes for any piping going through walls such as gas, electrical, etc.
The tried and true mouse traps will work if they haven't any other food source available, don't leave pet food dishes out overnight. If you don't want to use them, try disposable mouse bait stations which make disposal easy and worry free. The same preventative measures work on the garage as well. Seal any gaps (garage doors, pedestrian doors, inside plumbing,etc) and then set out your traps of choice. FYI, there are outside mouse and rat bait stations that are childproof that work really well as outside remedies before they get inside too.
Some will tell you moth balls will work, and others tell you placing drier sheets in your car and around it works. These don't work, sealing problem areas and either traps or bait stations inside and out work year round.
Here's a link to just one source for bait and traps.
https://www.tomcatbrand.com/en-us/library/using-baits/using-bait-stationIf all else fails, get a cat! Lol!