Jumbo frames are only support on Gigabit interfaces. So that is a no to the first line.
I don't know for sure, but it is my expectation that the others would support Jumbo frames. People normally enable Jumbo frames for performance reasons - so I don't know if there is much point on a 1905 ...
Note that the performance benefits of using Jumbo frames is greatly related to latency. If you have very low latency (like less than 5ms) there is almost no gain. While with high latency, like 100ms, the performance gain can be quite large for some applications.
Also note that the 3945 (and to some extent the 1905) have both been replaced by the 4000 series of routers.
http://www.cisco.com/c/en/us/products/routers/4000-series-integrated-services-routers-isr/models-comparison.html
