The "cables" sold by the dealer?
The Bolt comes with a portable EVSE that plugs into standard outlets (120 V). You can buy "120V Charge Cord, Portable (Additional)" for $535, but it is identical to what comes with the car already. This will allow you to charge at a rate that will get you about 3-4 miles per hour of charging and will be too little for 100 miles a day.
You need an EVSE (Electric Vehicle Supply Equipment) that plugs into a 240 V circuit. People tend to call this unit a "charger", but the charger is actually located in the car and the EVSE (or charging station) supplies the power. A few people will have an outlet in their garage already (Dryer, welder, etc.), but most will need to have one installed. To maximize the Bolts charging, you need a 40 A 240 V circuit. Since these are "continuous duty" devices by code, you can only use 80% of the rated circuit. A 40 A circuit allows you to use a 32 A EVSE (which will allow the Bolt to charge at it's maximum rate. The cost to install such a circuit can vary greatly (distance from current breaker box, room in the current box for a new circuit, etc.)
EVSE's are available from your dealer (an Aerovironment unit) for $699. There are better deals out there. Clipper Creek and the Juicebox line from eMotorWerks are well regarded, but Home Depot and others also carry EVSE's.
Most people opt for the DCFC option. The Bolt uses the CCS standard (as opposed to CHAdeMO or the proprietary Tesla system). This "Quick Charging" allows for charging up to about 4 times faster. These units are not installed in homes, but are found in commercial locations.
If you go to
plugshare.com, you can filter for "CCS DCFC" under "more options" in the legend box to see what is available near you.
Some ultilty companies have reduced rates for EV owners. They often are Time of Use or TOU plans that give reduced rates for charging in low demand periods (at night). Some locations also offer rebates on equipment.
You can find a rebate list here (and browse for other articles of interest):
http://www.plugincars.com/federal-and-local-incentives-plug-hybrids-and-electric-cars.html
On buying an EVSE:
http://www.plugincars.com/quick-guide-buying-your-first-home-ev-charger-126875.html
Being able to fuel at home is a big advantage and major convenience. Stopping at the gas station is so ingrained that most people don't realize how inconvenient it is until they no longer have to do it on a regular basis. The downside is that charging is still much slower (even the DCFC option), so long trips that require charging on the road require more planning.
Please follow up if you have any more questions. People on the forum are glad to help!