Combining Two shaders

Hello, I am trying to combine two shaders. I want to have something like Seethrough effect, when my object is for example behind rock, i still want to see something, like some color or anything else. I found the SeeThrough shader, which even has tutorial how to merge it with some different shader:

 Shader "Simple SeeThrough v2/Unlit Player"
 {
     Properties
     {
         [Enum(Off,0,Front,1,Back,2)] _CullMode ("Culling Mode", int) = 0
           _Color ("Color", Color) = (1,1,1,1)
         _SeeThroughColor ("SeeThrough Color", Color) = (1,1,1,1)
         _MainTex ("_MainTex (RGBA)", 2D) = "white" {}

     [Header(Cutout)]
     [Toggle(ISCUTOUT)] _isCutout ("Is Cutout?", Float) = 0
     _Cutoff ("Alpha Cutoff", Range(0,1)) = 0.5
 }
 SubShader
 {
     Pass
     {
         Tags {"Queue"="Transparent+100" "IgnoreProjector"="True" "RenderType"="Transparent"}
         Blend SrcAlpha OneMinusSrcAlpha //Alpha Blend
         Lighting Off ZWrite Off Cull [_CullMode]
         ZTest Greater
         CGPROGRAM
         #pragma vertex vert
         #pragma fragment frag_unlit_seethru
         //#pragma fragment frag_unlit_seethru_invert
         #pragma shader_feature ISCUTOUT
         #include "SCTCGUnlit.cginc"
         ENDCG
     }

     Pass
     {
         Tags {"Queue"="Geometry" "RenderType"="Opaque"}
         Lighting Off ZWrite On Cull [_CullMode]
         ZTest LEqual
         CGPROGRAM
         #pragma vertex vert
         #pragma fragment frag_unlit
         #pragma shader_feature ISCUTOUT
         #include "SCTCGUnlit.cginc"
         ENDCG
     }
 }
 }

and it says: copy Properties and first Pass{} to another shader, for example this:

 // Toony Colors Pro+Mobile 2
 // (c) 2014-2016 Jean Moreno


 Shader "Toony Colors Pro 2/Mobile"
 {
     Properties
 {
         //TOONY COLORS
         _Color ("Color", Color) = (1.0,1.0,1.0,1.0)
         _HColor ("Highlight Color", Color) = (0.6,0.6,0.6,1.0)
         _SColor ("Shadow Color", Color) = (0.2,0.2,0.2,1.0)
     
         //DIFFUSE
         _MainTex ("Main Texture (RGB) Spec/MatCap Mask (A) ", 2D) = "white" {}
     
     //TOONY COLORS RAMP
     _Ramp ("#RAMPT# Toon Ramp (RGB)", 2D) = "gray" {}
     _RampThreshold ("#RAMPF# Ramp Threshold", Range(0,1)) = 0.5
     _RampSmooth ("#RAMPF# Ramp Smoothing", Range(0.01,1)) = 0.1
     
     //BUMP
     _BumpMap ("#NORM# Normal map (RGB)", 2D) = "bump" {}
 }
 
 SubShader
 {
     
     
     Tags { "RenderType"="Opaque" }
     LOD 200
     
     CGPROGRAM
     
     #include "Include/TCP2_Include.cginc"
     
     #pragma surface surf ToonyColors noforwardadd interpolateview halfasview
     #pragma glsl
     #pragma target 2.0
     
     #pragma shader_feature TCP2_RAMPTEXT
     #pragma shader_feature TCP2_BUMP
     
     //================================================================
     // VARIABLES
     
     fixed4 _Color;
     sampler2D _MainTex;
     
 #if TCP2_BUMP
     sampler2D _BumpMap;
 #endif
     
     struct Input
     {
         half2 uv_MainTex : TEXCOORD0;
 #if TCP2_BUMP
         half2 uv_BumpMap : TEXCOORD1;
 #endif
     };
     
     //================================================================
     // SURFACE FUNCTION
     
     void surf (Input IN, inout SurfaceOutput o)
     {
         half4 main = tex2D(_MainTex, IN.uv_MainTex);
         o.Albedo = main.rgb * _Color.rgb;
         o.Alpha = main.a * _Color.a;
         
 #if TCP2_BUMP
         //Normal map
         o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
 #endif
     }
     
     ENDCG
     
 }
 
 Fallback "Diffuse"
 CustomEditor "TCP2_MaterialInspector"
 }

but it is not working and it will mess with it, when you add the Pass{} section to second shader. here is link to tutorial, Thank you for any help.