Impurity on body, clothes or place of Salaah

Q:

1. If beer, wine, alcohol touches my clothes, does it make them impure?

2. Is the prayer accepted while wearing such clothing?

Q: I happened to go to a musalla a few weeks ago. There is a courtyard separating the wudhu khana and the Salaah area. There was a lot of rain and it flooded the courtyard. People walked through to get onto the carpeted area. As I walked through, I had seen the droppings of fouls in the water which others also walked through onto the carpet. Others may have not seen it.

Is it necessary for me to inform the responsible people to have the carpet washed although they may have not seen it?

If yes, do the others need to repeat their salaats performed? If it is not necessary to inform them, what is the condition of my Salaah as I am aware of it?

Q: Will salah be valid if there's najasat less than the hollow of the palm on one's clothing?

Q: I set a musalla (prayer mat) on an impure ground. However the ground had no signs of impurity on it. If my feet get off the musalla (prayer mat) and touch the ground during salaah for just a short period of time, will my prayer be valid? No impurity came on my feet and the ground had no signs of impurity.

Q: Sometimes after getting my haidh, my underwear would become stained with blood and I would perform salaah in this manner. I also cannot recall how many salaah was performed like this. Please advise me what to do.

Q: A few men performing jamaat salaah in the masjid or individual salaah at home where there's small lizard's faeces scattered around. It got smeared on their palms, knees, etc. with or without their knowledge. Will their salaah be valid? Is the faeces of small lizard's clean or unclean?

Q: I performed the 1st rakaat of a salaah individually with an unclean (impure) trouser but I realized this during the 2nd rakaat. What do I have to do to correct the salaah ?

Q: Is the namaaz accepted if one is using perfume, using perfume for namaz is permissible?

Q: I burst a pimple on my thigh to remove its pus, and just rubbed the pus with my fingers, then I wore my undergarment and pants without cleaning the pus and/or blood that got stuck on my thigh after rubbing the pimple, nor did I clean my hands. Now, some amount of pus will stick to my clothes.

Is it allowed or okay to pray in those clothes and without cleaning it (pus) with water on my thigh and fingers or without taking a shower? I read on some websites that a small amount of pus or blood is okay and it will not break the wudoo, but my question is, will the clothes become najis after such activity or shall I take a shower to make myself clean before I pray, or at-least clean only where pus or blood got stuck? 

Q: If small baby urinates on my shirt or pants, will it be permissible for me to perform salaah with such clothing?