Why won't Minecraft let me play?

I have been having trouble with my Minecraft. When I try to open it up and play a world, it goes back to the log in screen. It doesn't say there's a crash report, it just goes back to the log in screen.
I have mods in the world that I'm playing in, and they are:
Team Crafted Mod
Lucky Block Mod
More Buttons Mod
Rei's Minimap Mod
Custom NPC's
FinderCompass

This started when I installed the Team Crafted Mod. I have been able to play some worlds with the mod, but it recently started doing this.

Is there a laptop that can run most modern games?

Is there a laptop that is around $450- $500 that can run most modern games such as Garrys mod on steam or GTA 4 on steam or Battlefield 3 and also minecraft on high settings also sometimes video record most steam games and minecraft without much fps drop and if not what are the requirments for what i want to do on the computer

Need to find a decent priced desktop computer with these requirements?

I'm looking for a desktop computer that can run at least minecraft multiplayer, Skype, and video record at the same time. Without much fps drop.

A laptop that can run steam with video recording and skype at the same time too on games such as garrys mod or GTA 4 and run it quite smooth.

Any suggestions will be a lot of help!
P.S. My budget is around $400 to $500

What should I upload to YouTube (gaming)?

I made a YouTube gaming channel about 3 months ago. I have 34 subscribers. I have a Minecraft Let's Play, a Minecraft Tutorial on how to make an end portal, a Left 4 Dead 2 Let's Play, and a PC Gaming vs. Console Gaming video.

Right now the video with most views is How To Make An End Portal in Minecraft 1.7.4
I uploaded it a month ago and it has about 1,800 views.

These are the games I have (PC):
Minecraft, Call Of Duty: Black Ops 2, Left 4 Dead 2, The Elder Scrolls V: Skyrim, Star Wars: The Old Republic, Slender - The Eight Pages

What should I upload about these games? These are some things that I have or I'm planning to upload:
-Minecraft Let's Play
-Minecraft Tutorials
-Minecraft Creations
-Minecraft Mod Showcase
-Left 4 Dead 2 Let's Play
-Left 4 Dead 2 Mod Showcase
-The Elder Scrolls V: Skyrim Walkthrough
-The Elder Scrolls V: Skyrim Mod Showcase
-Slender - The Eight Pages Attept To Complete
-Slender - The Eight Pages Completed
-PC Gaming vs. Console Gaming
-Laptop Review

Any other suggestions? Something that will get lots of views

Do you need permission to make minecraft mod videos?

I get some mod pack let plays

I messed up my minecraft mods, halp?

I don't know if I've miss clicked, or I was being stupid but I took the entire mods file out of my computer libraries( with mods inside). Ever since I realized what I did I put the file back and the game never changed at all. I've looked at over 30 different sites trying to find what went wrong and found nothing! I've also re downloaded it and went into the roaming file then I didn't know what else to do.

I really want to get this fixed because I want to keep going with my YouTube channel.

Where do I find my pixelmon file?

I downloaded the minecraft pixelmon mod a while ago without having forge on accident. Now I have forge and I still can't find pixelmon in my files. I have tried re-downloading it from the site but it says I have already downloaded it and won't let me. So where can I find it?

Is there a mod that make people not aloud to break or build in certain areas minecraft?

Is there a mod that let's you set locations where only ops are aloud to break and build, I've heard of worldguard, but am not sure if you can't set locations. Are there any better ones than worldguard?

What computer should I get to do let's plays on minecraft for mods?

I want to be a famous minecrafter what computer should I go for? Would a turtle beach px3 work for a mic it has option to hook up to pc

Minecraft Alarm/Security sound mods?

Are there any mods for the latest version of Minecraft (1.7.4) which have the sounds of Sirens and Base alarms? Like the sounds below:

I know there's Security mod and Alarm mod but they are outdated, anyone know of any?