Hey peeps, how's it going? Hope everyone is good!

So I have a 1990 Honda Civic Dx. The issue is that I have to fill up the rad with coolant all the time, like, every 50 kms or sometimes less! Also a few times, the car does not start properly. I had to press on the gas immediately after I turn on the ignition so that it doesn't stall.

I'm poor and don't have the money to go to the mechanic. Can anyone help me figure out what is the problem?

Thanks!
Hurley