Can my landlord evict me immediately if we only have an oral lease agreement?

Absolutely not. You cannot be evicted without a court order. You will need evidence of verbal lease agreement like cancelled checks and utility...

What to do if landlord didn't return full security deposit?

Schedule a consultation with a Landlord Tenant lawyer. You may be entitled to double your security deposit.

Although she is not legally entitled to sell the property without the husband's consent since it is marital property, since the husband's name is...

It is a 3 day right of rescission for a consumer contract...not a cooling off period....and the cancellation better be in writing.

Can my landlord change lease terms?

If you have a fully executed (both parties signed) long term lease, then the terms cannot be changed and they cannot ask you to sign a new lease. ...

Can I force compliance with HOA by-laws by a rogue board?

It does sound like it violates your bylaws. I would schedule a consultation with a real estate lawyer.

If my sister n her deviant scamming husband got my dad to sign over his house into sisters name, do siblings have rights

Tell your dad he was misled. The house now belongs to them and you and any other siblings have no rights to inherit now...

Can I take tenants to small claims court for violations of lease?

I agree but its not small claims per se. .its a landord tenant matter in magisterial district court...same court but different forms....

Can I take my landlord to court for not refunding my security deposit?

Yes but its landlord tenant court through magisterial district court. But you can definitely fight this....often we can resolve it without going...

As I understand you are proposing to sell your property to your sister in law for the amount of the balance due on the mortgage. That you CAN do. ...