Where do you plan on going?
I know at Boreal (not really Lake Tahoe) they won't let you through the gate with out a pass, but if you pay for the little beginner lesson you get the lesson, the rental gear and a lift pass for the day. I'm pretty sure any or all of the Tahoe resorts will have a similar deals. Check their websites.
This is what I did at Boreal: 3 days of lessons (non consecutive days, but you could do them one after the other) 1st day was $65, then the 2nd and 3rd were only $25 each. Then
after I did the third lesson, they gave me a Season Pass. $115 for 3 days of lessons, with rental and lift, and
then a free Seasons pass?! Too good. Even if you just did two days, it would be 90 dollars, plus you'd get the teaching proper.
Note: I am in no way affiliated with Boreal Mountain Ski Resort.
Check online for these deals, clearly worth it.