jquery is installed as an installable extension during the installation progress -for the installable extension to be there the project must be compiled in release mode, I'm not sure why that's not working for you

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Even if you pass that hurdle, most probably you will get into an install problem if you run just from the source version.

Here's what works for me every time:
1- Unzip the source zip into a folder.
2- Unzip the install zip (another download) on top of the 'website' folder from step 1. OK to overwrite all the files
3- Create an empty database in sql server
3- modify web.config to use the proper connectionstring properties
4- Open DNN_PlatformNoTests.sln in Visual Studio. (That's the solution file I decided to use. I don't need the test projects. The other solution files might work but I didn't try)
5- Make the website project the startup project
6- Run. This should start the new installation process and then your DNN website is ready
7- This worked for me using different DNN versions. I use this setup because there are times I want to understand how code in the platform works or to debug.