1 - what is valid collaterals
There are many different things of value that can be considered as valid enough. This also depends on the lenders discretion what they are comfortable with. Here is an educational post regarding this which you should have gone through instead of making this thread - [EDU] The Rule of "No Collateral, No Loan" - IGNORE AT YOUR OWN RISK! Quote
2 - how i can get loan , lender can get collaterals without give me loan
Rarely a lender would be willing to risk their money to a newbie. If you dont traders will trusted users previously then you might have a chance but the probability is pretty slim. 
