Macbook Pro not responding to keyboard or power button
Would it boot with the old (original) hard drive? If so, you need to either clone the HDD to the SSD via Disk Utility (hold Cmd+R at boot), or install OS X anew on the SSD. You can use DiskMaker X to prep a USB installer, or use a OS X install DVD, assuming you can find one and the MacBook has an optical drive (fairly sure a '10 model does). 

Just sounds like a mechanical issue with the keyboard, but hard to know without OS X installed. I would simply plug in a USB keyboard (any keyboard will work) and try that.