Tf2 questions

best you look here

1) normal weapons aren't marketable
2) The drop count is random, but normally between 8 and 12 items / week (a week starts on Wednesday/Thursday, depending on your region).
3) Crates have their own drop event

read more on the TF2 drops system

All answer could have been found with a simple google search

the only thing you will make money off of is unusual hats which you get from crates. that and the market in game with metals is crazy

You can't rely off making money off drops. Crates do not count towards your weekly drop limit. Most crates are worthless but currently the stockpile crate is like 10 cents and the audition reel is ~$1 . To make money off tf2, you have to merch a lot. This requires some investment because metal is valued pretty low right now.