Ok, thanks

When it comes to outputs, can they be always "1" ? I haven't found any ouput > 1
The transaction you referenced in the OP has two outputs.
It is very common for an individual to have transactions that have exactly two outputs, one to the person/enttity they are sending coin to and one
change output.
Many businesses who send many transactions per day will consolidate transactions such that they send coin to many individuals/entities in a single transaction.
Here is an
example of a recent transaction that has more than two outputs.
I thought about required_signatures parameter for outputs. This parameter doesn't include P2SH Multisig. It shows "1" for multisigs addresses. I am right?