Where did you buy it from, and what specifically is it called? If it is the "Windows 10 Edition" it cannot run forge, you need the Java edition.
Unfortunately I can't get a direct link to the one you'd want on minecraft.net, but on the list of editions it's just "Windows".
You need to update, 1.7.10 is no longer supported on these forums.
It is stated in the EAQ that old versions are not supported here: http://www.minecraftforge.net/forum/topic/20-rules-and-eaq-read-first-or-you-will-get-banned/
You might be able to find the version you want from the Files link at the top of the page, however, if you run into issues a Minecraft version that old will not be supported here, so you would have to seek help elsewhere.
Doesn't matter where it came from or who uses it, 1.7.10 is so out of date it is no longer supported here. You should take the issue right to the modpack creators.
You need to post the fml-client-latest log file, it contains more information than the crash report.
Also, someone else is having issues with pixelmon for 1.10.2, I'd hazard a guess that it's broken and anyone having issues with it should contact the author.
Are you playing locally or on a server? It looks like a network connection is failing, but aside from that, I'm at a loss. Hopefully someone else might see this and know what's going on!
Please post the fml-client-latest log file, details in the EAQ: http://www.minecraftforge.net/forum/topic/20-rules-and-eaq-read-first-or-you-will-get-banned/
I wonder if it's something broken in the MS VC runtime, since part of the error says
Maybe try removing/reinstalling Microsoft Visual C++ 2010 runtime?