Miguel, Sounds like you're having a run of bad luck. The throttle problem could be in the grip, if you have just 1 broken strand in the cable, it can really bind things up as Ron mentioned. It can start to unravel within the cover. Do as Fred suggested on removing the grip. Then look for any broken strands, and if you have a new one to install, make sure there are no kinks or sharp bends in it when you are routing it.Don't forget to lube it.
The clutch could have the same problem (if it's cable engaged) I don't know how yours works, but if that happens again, remove your spark plug, it will be alot easier to push if you have to. How are things now since you got it home and thawed out?
COME ON SPRING!