Hi
".......... I'm having trouble though with the Title clip. It just runs for 3 seconds and I cannot figure out how to make it play longer........"
If you used one of the intro templates it will have been loaded to the start of the project on Video Track 1 and will precede your own clips. Depending on its content it may also have a text component on Track 2 above it. The duration of the template can be set when you set it up.
If you used a Text clip this will appear on Track 2 as by default it's an image with transparency. Note that Text clips are images and as such play for the default still image time shown in Menu/Tools/Options/Media/Default still image duration and this can be set beforehand.
If you have already placed a text clip, changing the default duration won't reset the clip.(only new ones if you add more) If you have used a text image you can lengthen the time it displays by grabbing the white block handle at the end of the clip (a square arrowed bracket will appear) and dragging this out along the track.
"........It also overlays the sequence video (though not the sequence sound). I want it to play before the commencement of the sequence video and sound. How is that done?....."
As you note, the text will overlay Track 1. If you want it to play before your clips then ...
Grab the text clip on the overlay Track
Drag it down to Track 1 and move it to the left so the white arrowed line is at the start of the track.
Release the clip and it will be placed at the start before your clips which will move along to accommodate it.
Note that unless you have used Full Background colour option in the text editor when you set up your text, the transparent area will export (and appear in the sequence preview pane) as black. There are many options so keep experimenting.
Nat