Is it permissible to use 个 in any nouns as a measure word?
I would say somehow it's true in informal circumstances. 

But I don't quite agree with the definition of 个化 above in which 个 as a classifier is going with nouns. When you say 一个车 or 一个房子 alone, it definitely sounds odd and ignorant. 

My take to this, instead, is 个 goes with a verb, being the form of "verb+个". Then it becomes the casual way to express the action of verbs. 
For example, 我去提个车， 我去打个水， 我去玩个电脑, 我去乘个车，我打个游戏， 我推个车， 我骑个马 ....... Those sentences sound definitely natural to a native ear. If you say 我去提一辆车，我去打一盆水......, it sounds more formal than the sentences above. 

Almost everything can express like that. Again, the point is that it has to go with a verb, instead standing alone. 一个车，一个水，一个电脑，一个马，those terms alone sounds ignorant. 一个游戏 sounds ok because 个/款 are right classifiers for it.

I suggest you carefully use this rule in informal situations before you get the hang of it.