Is it enough? No, there is no such thing as 'enough'. But, if it is all you can afford right now, then that is where you are at. You mentioned 2 speakers only, so I'm not sure where you get 3 speakers plus the pair of Bose...
In the end: A 5.1 system for surround (5 speakers plus a subwoofer) is a pretty standard/generic surround setup. The quality of the sound will depend on the quality of the speakers you get and that combination with the receiver you purchase. The Pioneer is an excellent product for the money and I feel you are making a good choice there.
If you are purchasing additional speakers, or want to know about the quality of the speakers you have, then that should be addressed separately, and you likely will get better responses in the speaker section of this site. Just an FYI: Bose is not often spoken of as one of the better choices in speakers and is generally considered fairly low quality overall. The 141s at the very least allow for traditional wiring.
How to wire?
You already answered that question. How do you make the connections between the receiver and the speakers? With speaker cable! You can pick this up from many places - even you local Home Depot. Better stuff and cheaper/higher quality may be found online. But, you just need to run a speaker cable (14 or 12 gauge wire is what I would go with) from the receiver, to the speaker. Put the red wire on the red terminal for the spaker, put the other end of the red terminal on the back of the receiver... on... you guessed it... the red terminal! Do the same with the black wire/black terminals. The location of speakers will be covered in the 1016 owners manual and there is good info on this site for speaker placement.
The subwoofer should be an active model which you will need to plug into the wall. The receiver has a 'subwoofer out' or 'LFE out' jack on the back. Connect a standard video cable (yellow RCA ends) from the receiver to the subwoofer and you will have your subwoofer audio output ready to go.
Depending on how well you want to hide wires it could take from 30 minutes to a full day to setup the system to your satisfaction - but the setup itself stays the same. Pretty darn easy overall.