Lots of issues - I think they are related?

The air in my car has stopped blowing anything on and off for almost 2 years
now. Sometimes it will work fine, other times it won't blow anything for
weeks at a time. Other times it will blow for day and then the next day it
won't - You never know if the air will work or not.

I also have an issue with shifting gears. Only sometimes, 2-3 days out of the
week, it's almost as if the car doesn't recognize that my foot is on the break
so it "locks up" my gear shift and I can't move it from park to reverse or
drive. Sometimes I just have to try several times in the course of 2-10
minutes and then it'll work all of a sudden.

Sometimes, maybe every other week, it also won't recognize when I take my
key out of the ignition. When you leave your key in when you have this car it
beeps when you open the door. I normally have to put the key back in and
take it back out a few more times and then works again and it stops
beeping... As of last night, no matter how many times I put the key in and
took it out, it wouldn't recognize I took the key out of the ignition and it still
doesn't today.

I think it may be fuses or control panels or something like that semi-related?
I don't have a lot of money on repairs...what do y'all think it is and how
much to fix it? Thanks!