As a 'resident alien':
1. do I need to report my account outside USA?
2. do I need to report my real property outside USA?
3. I have been in US(with L1) for 1.5 years, if I sell my house abroad, do I need to report tax for such income?
Yes, you need to report these items.
Per the IRS " Federal law requires U.S. citizens and resident aliens to
report any worldwide income, including income from foreign trusts and foreign
bank and securities accounts. In most cases, affected taxpayers need to fill
out and attach Schedule B to their tax return. Certain taxpayers may also have
to fill out and attach to their return Form 8938, Statement of Foreign