Stop spam posting ffs, use comments or type it all in one post, first of all your computer is a massive pile of shit and won't be able to run the game due to you not having a graphics card in your laptop meaning you are running on intels onboard graphics, also your processor is 5 years old and is a laptop processor, uninstall all of you shitty gmod addons and try downloading the content from here like I said.
Could be because of custom scripts or could be because of your laptop/PC specs in anyway case if the reason in the laptop then Follow these steps:
1: Open steam and go to the games library
2: Right click the (Source) game you would like to reduce lag in
3:Click launch options
4: Copy and paste this code into the bar -dxlevel 80 +mat_antialias 0 window
5: Enjoy having less lag
If they dont work then just through that laptop/pc into the bin and tell your parents you got robbed should also work