If he gets convicted of First Degree Murder, the rest of these charges will matter very little. To answer your questions, though, First Degree Burglary is a Class D felony. Depending on the defendant's record, it could carry a sentence of as much as 210 months in prison each or as little as 38 months each. Armed Robbery is also a Class D felony, carrying the same potential punishment. Second Degree Kidnapping is a Class E felony. It can carry as much as 94 months in prison or as little as a suspended 15 months sentence and probation.
It sounds like he has a tough fight ahead of him. Best of luck.
For more on dealing with serious felony charges, take a look at this video: