Im scheduled for immigration interview in August, What fees should i expect to pay once im there?

you don't pay, but your wife does, you may pay her green card fee of $165.00 after she receives her visa so her card can be issued.

Would I need a joint sponsor ?

if you did not have an income until end of 2014, then a joint sponsor may be needed if your spousal income is not adequate or is not legally earned...

you will not be tested medically for N-400, so as long as you are not convicted of a drug offense or admit it you may be able to dodge the bullet.

did you try printing it and see if it prints it ok?

Hi my husband make to me I-130 from March until now I don't take approve and cases after me they had approved ?

normal processing time is within 6-7 months. hang in there.

Should we remove conditions on my residency 9 months of receiving my CR1 visa? That wil be 2 years of merriage date.

you can begin within the 90 days before your second anniversary of your entry as CR1.

Married an immigrant he just obtained permanent status, now he moved out of our home. How do I protect myself and myself?

unfortunately you are liable if he receives federally subsidized benefits. you are not however responsible for any other obligation he may have...

H1-B Extension post initial 6 years period on a revoked I-140 petition

once an I-140 is revoked you no longer qualify for H-1 extension beyond the 6 years, but all times spent out of the US can be recaptured by filing...

Marriage based 4 years of marriage now

it is more likely a mistake or misreading on your part based on these facts.

I am trying to change status to H4 to F1. How early can I submit the COS application (along with I-20) with USCIS?

you could submit early but as an H-4 you don't need an F-1 status to enroll in classes.