First off I'm using ATLauncher and forge is installed and everything i can use server side but not client side and its hard to see what is selected with out client side i have an error as well.

Minecraft Crash Report ----

*** ATTENTION: detected classes with unsupported format ***
*** DO NOT SUBMIT THIS CRASH REPORT TO FORGE ***

Contact authors of the following mods:
ForgeEssentialsClient

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [HUG]

Time: 11/22/16 10:46 AM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderException: java.lang.ClassNotFoundException: com.forgeessentials.client.ForgeEssentialsClient
at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:162)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:543)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:208)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:417)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: com.forgeessentials.client.ForgeEssentialsClient
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at net.minecraftforge.fml.common.ModClassLoader.loadClass(ModClassLoader.java:65)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:468)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:512)
... 10 more
Caused by: java.lang.UnsupportedClassVersionError: com/forgeessentials/client/ForgeEssentialsClient : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 38 more

A detailed walkthrough of the error, its code path and all known details is as follows:

-- System Details --
Details:
Minecraft Version: 1.8.9
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_80, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 112827864 bytes (107 MB) / 259522560 bytes (247 MB) up to 4260102144 bytes (4062 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -XX:-OmitStackTraceInFastThrow -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xms256M -Xmx4096M -XX:PermSize=256M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.19 Powered by Forge 11.15.1.1722 5 mods loaded, 5 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UC mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UC FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1722-universal.jar)
UC Forge{11.15.1.1722} [Minecraft Forge] (forge-1.8.9-11.15.1.1722-universal.jar)
UC cfm{4.0.1} [MrCrayfish's Furniture Mod] (cfm-4.0.1-mc1.8.9.jar)
UE ForgeEssentialsClient{1.8.5} [Forge Essentials Client Addon] (forgeessentials-1.8.9-1.8.5.103-client.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.2.0 - Build 10.18.10.3496' Renderer: 'Intel(R) Iris(TM) Graphics 5100'

Any ideas?

Try it again with Java 8.

It's definitely something to do with no Java 8 on his PC.