G'day Mongrel
By all accounts the Marlin is a pretty good piece of kit and excellent value. The Weatherby mentioned is a Howa 1500. As for scopes, you'll need to spend at least as much on the scope as you do on the rifle to get anything that is going to have decent glass, good repeatable adjustment and reliability.
You haven't said what type of target shooting you are likely to be doing. For a decent "target" scope they start at around a grand.
I personally shoot metallic silhouette and all of my scoped rifles wear VX-111 Leupolds with 3/8 target dot reticles. These have very good repeatable adjustments which, as we shoot anywhere from 40 to 500m, are in constant use. As for use in the field they are useless. You can't see the cross-hair, it's too fine.
My hunting rifles all wear Khales.
I don't mean to put you off, I started shooting back in the 1980's. We all have a budget we have to work to. I started with Tasco's and Nikko's, probably like most blokes on here.
You have to start somewhere, good luck.